CaptainCrutch Posted January 19, 2019 Share Posted January 19, 2019 I really love these models of trucks because they have the B fenders I love with a huge radiator and the option of an L cab that I also adore. I’m just wondering what the difference is between the B-73, B-75 and B-77. I plan on trying to buy one at some point in the future to haul my antique firetrucks with I just can’t at the moment. Quote Who needs a back yard when you could have a Yard?! Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/ Share on other sites More sharing options...
yarnall Posted January 19, 2019 Share Posted January 19, 2019 A B73 has Cummins power. A B75 has Mack power. I don’t know what a B77 has but someone else will. The L Model style cab was an option. They could also have the standard B cab. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413580 Share on other sites More sharing options...
Popular Post j hancock Posted January 19, 2019 Popular Post Share Posted January 19, 2019 Over the model run there was some variation in some specs, but this is a basic look. B73 - Cummins NH 220 and NH 250 HP B733 - Cummins NT 250-280 HP turbo motors B75 - Mack END 673 170-180 HP, also END 711 after 1962 B753 - Mack ENDT673 205-210 HP turbo motor B755 - Mack END 864 250 HP V8 motor B77 - Supercharged Cummins NHRS B773 - Cummins 335 HP turbo motor 2 1 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413584 Share on other sites More sharing options...
41chevy Posted January 19, 2019 Share Posted January 19, 2019 Wasn't Waylon Jennings Mack a B77? Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413596 Share on other sites More sharing options...
CaptainCrutch Posted January 19, 2019 Author Share Posted January 19, 2019 (edited) Thanks everyone, I’m a Mack man all the way so it looks like I’ll be looking into getting a Mack B-75, B-753 or a B-755 when the time comes. I have the 2 fire trucks but I want one of those B-75s to be my first real semi truck. Once you go Mack you never go back... Edited January 19, 2019 by CaptainCrutch 2 Quote Who needs a back yard when you could have a Yard?! Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413598 Share on other sites More sharing options...
Freightrain Posted January 19, 2019 Share Posted January 19, 2019 (edited) But there is something about those old supercharged Cummins. They do sound GOOD!!! Edited January 19, 2019 by Freightrain 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413599 Share on other sites More sharing options...
Maddog13407 Posted January 19, 2019 Share Posted January 19, 2019 ialways thought Miss Jesse started out as a B75 and Waylon had a shop make it a B77 or B773, somewhere I have read a story of the Diesel shop he used back in the day for his fleet. he also had an F model and I have seen pictures of a cabover KW Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413604 Share on other sites More sharing options...
BillyT Posted January 19, 2019 Share Posted January 19, 2019 Did Waylon have a tractor named"Amanda" or would Jesse have been jealous? Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413623 Share on other sites More sharing options...
mackdaddy Posted January 20, 2019 Share Posted January 20, 2019 On 1/18/2019 at 5:59 PM, j hancock said: Over the model run there was some variation in some specs, but this is a basic look. B73 - Cummins NH 220 and NH 250 HP B733 - Cummins NT 250-280 HP turbo motors B75 - Mack END 673 170-180 HP, also END 711 after 1962 B753 - Mack ENDT673 205-210 HP turbo motor B755 - Mack END 864 250 HP V8 motor B77 - Supercharged Cummins NHRS B773 - Cummins 335 HP turbo motor what about the B-7553........or an 864 twin turbo? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413672 Share on other sites More sharing options...
Superdog Posted January 21, 2019 Share Posted January 21, 2019 21 hours ago, mackdaddy said: what about the B-7553........or an 864 twin turbo? never made one as far as they records go anyway. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413751 Share on other sites More sharing options...
Popular Post AZB755V8 Posted January 21, 2019 Popular Post Share Posted January 21, 2019 17 hours ago, Superdog said: never made one as far as they records go anyway. Mack did not make a turbo V8 in a B model from the factory that I know of. I did see a 864 twin turbo B model for sale in the Wheels of Time years ago, it was yellow, wonder what happened to it? Think they were asking about $20-25K for it. This is my 1965 B-755 that came with a normally aspirated 864. They were not good engines and forget about parts so when the truck was restored I put in a rebuilt 375HP 866 V8 single turbo that I could get parts for back then. So there are at least 2 B's with Turbo V8's around. I really wanted to put a E9-500 in but the Quadbox still in the truck would not have survived for long. Engine color is right for 1965 V8 but originally a Silver engine. 8 Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413808 Share on other sites More sharing options...
terry Posted January 21, 2019 Share Posted January 21, 2019 very very nice.👍👍👍 terry Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413813 Share on other sites More sharing options...
Brian L Blaylock Posted January 22, 2019 Share Posted January 22, 2019 I have a ENDT-865 shoe horned into my B-615 Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413834 Share on other sites More sharing options...
AZB755V8 Posted January 22, 2019 Share Posted January 22, 2019 11 hours ago, Brian L Blaylock said: I have a ENDT-865 shoe horned into my B-615 The truck should have had everything needed to fit the newer 865 into it. The B-615 did have an 864 in it and there were modifications right from Mack to get the V8 to fit when built. It would be hard to fit a V8 into an original NON-V8 B-model because of it. We did nave to modify the pulley in back of the fan to get the 866 to fit in the B-755 to length reasons, it is certainly a tight fit and even tighter in a B-615. Cool truck....But we have to have photos as proof it exist... Photos Brian Photos... Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413850 Share on other sites More sharing options...
h67st Posted January 22, 2019 Share Posted January 22, 2019 22 hours ago, AZB755V8 said: Mack did not make a turbo V8 in a B model from the factory that I know of. I did see a 864 twin turbo B model for sale in the Wheels of Time years ago, it was yellow, wonder what happened to it? Think they were asking about $20-25K for it. This is my 1965 B-755 that came with a normally aspirated 864. They were not good engines and forget about parts so when the truck was restored I put in a rebuilt 375HP 866 V8 single turbo that I could get parts for back then. So there are at least 2 B's with Turbo V8's around. I really wanted to put a E9-500 in but the Quadbox still in the truck would not have survived for long. Engine color is right for 1965 V8 but originally a Silver engine. AZB, those polished aluminum pieces on your engine look great. When my truck grows up, I want the engine to look just like yours! Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413863 Share on other sites More sharing options...
AZB755V8 Posted January 22, 2019 Share Posted January 22, 2019 2 hours ago, h67st said: AZB, those polished aluminum pieces on your engine look great. When my truck grows up, I want the engine to look just like yours! Thanks, The polished stuff would not have look as good on a silver engine that it started out as. 866 V-8's where silver in the early 70's and that is what I started with. Gold color was on the 865's All it takes is time here and there, files, sandpaper, polish and a BLACK hands from aluminum grit and polish. It did not happen over night but over a year or two. Man the casting to start with are not good quality, you can see definite differences in color within a valve covers and radiator. Must have been the filler scrap aluminum they melted into the mix when cast. Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413874 Share on other sites More sharing options...
Rob Posted January 22, 2019 Share Posted January 22, 2019 I had some small pieces parts for an ENDT-866 powder coated aluminum finish and they look very close to polished aluminum parts, but they'll stay looking like that without maintenance. I may do the rocker covers and intake plenums too, but haven't looked into the cost yet. Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413875 Share on other sites More sharing options...
Truck Shop Posted January 23, 2019 Share Posted January 23, 2019 (edited) That Pete has a Iron lung on it. On 1/18/2019 at 9:36 PM, Freightrain said: But there is something about those old supercharged Cummins. They do sound GOOD!!! Edited January 23, 2019 by Truck Shop 2 Quote One ping only Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413887 Share on other sites More sharing options...
Truck Shop Posted January 23, 2019 Share Posted January 23, 2019 That Pete has a 300 Iron lung Quote One ping only Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413889 Share on other sites More sharing options...
AZB755V8 Posted January 23, 2019 Share Posted January 23, 2019 36 minutes ago, Truck Shop said: That Pete has a Iron lung on it. 34 minutes ago, Truck Shop said: That Pete has a 300 Iron lung Just observing but did this post to the wrong thread? We are taking about B-7X Mack's here not Pete's? Is this related to a Supercharged HNRS in a B-77 Mack? By the way this engine is my second favorite behind an E9, so much so I got one in a 53 LTL. No disrespect. Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413892 Share on other sites More sharing options...
Freightrain Posted January 23, 2019 Share Posted January 23, 2019 (edited) Yup,. I like the sound from them. The Pete came up because I commented about liking the sound of the old Cummins and I found that video to let everyone hear it.. I like Mack's, but also the old supercharged Cummins. That's all. Edited January 23, 2019 by Freightrain Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413893 Share on other sites More sharing options...
Brian L Blaylock Posted January 23, 2019 Share Posted January 23, 2019 AZB I’ll see what I can do Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-413912 Share on other sites More sharing options...
mackdaddy Posted January 29, 2019 Share Posted January 29, 2019 On 1/20/2019 at 5:42 PM, Superdog said: never made one as far as they records go anyway. I don't think Mack ever designated the V8 B series with a 3 for turbo. Here is one that was at Lexington that had the factory installed twin turbo'd V8. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-414353 Share on other sites More sharing options...
Superdog Posted January 30, 2019 Share Posted January 30, 2019 22 hours ago, mackdaddy said: I don't think Mack ever designated the V8 B series with a 3 for turbo. Here is one that was at Lexington that had the factory installed twin turbo'd V8. did they have the twin turbo V8 in '63? I thought it came later,'66 or so.. Maybe this was a test truck for the engine?? Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-414435 Share on other sites More sharing options...
AZB755V8 Posted January 30, 2019 Share Posted January 30, 2019 That Gray B with the twin turbo 864 maybe the truck that I was talking about for sale years ago and was yellow back then if I remember right. Yes that twin turbo V8 may have been factory installed just in another truck first. Then transplanted like the one I got. The 866 was factory installed in a R model before it was installed in my B-755. Originally a V8 truck just had the normal 864 at birth. No slam here, just happy to see one exist, factory or not!! Rare, Rare to see an 864 running let alone a twin turbo, Great looking B!! By the way if anyone wants a set of those 864 turbos in good shape for spares or to use let me know $500 plus the ride. Got base and pedestal to throw in too. Looking at the photo, that owner must keep a close look at the stacks with TWIN smoke mirrors. Maybe one stack is different from the other. LOL!! Quote Link to comment https://www.bigmacktrucks.com/topic/55348-differences-between-mack-b-73-b-75-and-b-77/#findComment-414441 Share on other sites More sharing options...
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