doubleclutchinweasel Posted March 10, 2022 Share Posted March 10, 2022 Saw this on TruckPaper. I know sometimes they mess up the descriptions (fat-finger). But, this one has me scratching my head! I know Mack lists RDs as far back as '71, and the interior IS the old steel dash. But, weren't all RDs tandems? Never heard of an RD300. Probably a mis-print. What engine does that look like to you guys? Notice the square headlights? Didn't have those in '72. Interesting-looking truck. Lots of work apparently done. Just don't know EXACTLY what is is! Should spark some interesting discussion, at least! https://www.truckpaper.com/listings/trucks/for-sale/200468519/1972-mack-rd300 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/ Share on other sites More sharing options...
mowerman Posted March 10, 2022 Share Posted March 10, 2022 looks like just an R600 to me...later nose with custom headlights.....lotta nice work done...i didnt think RD came along till alot later dont know whats up with 300..bob Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491581 Share on other sites More sharing options...
tjc transport Posted March 10, 2022 Share Posted March 10, 2022 looks like a non turbo mack engine. either way, someone put a lot of work into it. 1 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491583 Share on other sites More sharing options...
Mark T Posted March 10, 2022 Share Posted March 10, 2022 That's someone's R Model toy (lol) Old R with a 673 (?) somebody was quite fond of. Looks to be other Macks in the background , it's easy to get the fever that fella had . 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491595 Share on other sites More sharing options...
terry Posted March 10, 2022 Share Posted March 10, 2022 probably a misprint on the 300 series? need to know the seriel # off the frame, that will tell you alot. looks like a older thermodyne engine that somebody put screw on oil filters, doesn't have a oil cooler. probably a triplex or quad transmission. terry 2 Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491601 Share on other sites More sharing options...
mechohaulic Posted March 11, 2022 Share Posted March 11, 2022 2 hours ago, mowerman said: looks like just an R600 to me...later nose with custom headlights.....lotta nice work done...i didnt think RD came along till alot later dont know whats up with 300..bob i noticed the later 3-piece hood , also no 5th wheel. might have bolt holes in frame for one can't tell by pictures. 4 headlights and bright yellow paint ; it's so different . twin stack mack Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491605 Share on other sites More sharing options...
doubleclutchinweasel Posted March 11, 2022 Author Share Posted March 11, 2022 3 hours ago, mowerman said: looks like just an R600 to me...later nose with custom headlights.....lotta nice work done...i didnt think RD came along till alot later dont know whats up with 300..bob According to Mack, RDs went all the way back to ‘71. The 3 is pretty close to the 6 on the number pad! The engine looked odd to me. like others said, I’d like to see the number on the frame. 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491607 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 33 minutes ago, mechohaulic said: i noticed the later 3-piece hood , also no 5th wheel. might have bolt holes in frame for one can't tell by pictures. 4 headlights and bright yellow paint ; it's so different . twin stack mack Not sure if you’re familiar buddy of mine in California put double stack on a six cylinder they really sound good and not over loud . Best way to make it sound good. If you figure out a way for a offset cab let me know ha ha… Bob Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491609 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 Also I thought it might’ve been a bobtail straight truck at one time hard to tell from the photos taillights look like they might’ve belong to a box truck at one time Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491610 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 Nice looking ride I really like it I wouldn’t put the dual headlights on mine but they do look good I think:::Bob Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491611 Share on other sites More sharing options...
mechohaulic Posted March 11, 2022 Share Posted March 11, 2022 I've seen the dual headlight set up on an RD . look better . you had to go and mention dual stacks on off set . brain cells still working on a DM800 6X6 1/25 scale. fabricating the eng/trans mounts to put a duel turbo cummins in the 800 . duel stack tractor maybe LOL Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491614 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 Ok since we’re on the subject…. Wait a minute you telling me you bought a 359 Peterbolt just for the engine???????????? Lol bob that’s a sin Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491616 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 I built one in1971 …. Bob Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491617 Share on other sites More sharing options...
mechohaulic Posted March 11, 2022 Share Posted March 11, 2022 39 minutes ago, mowerman said: Ok since we’re on the subject…. Wait a minute you telling me you bought a 359 Peterbolt just for the engine???????????? Lol bob that’s a sin yes i did. back in the '70's i bought the challenger mixer kit for the tiny water hose nozzle for the DM800 mixer i was building. my 352 pete has 7 model kits combined to make one. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491619 Share on other sites More sharing options...
doubleclutchinweasel Posted March 11, 2022 Author Share Posted March 11, 2022 To you guys discussing the model kits... I used to build those all the time in the '60s-'70s. Had pretty much every one they made. Started getting duplicates and "kitbashing" them (mixing and matching parts from the kits). Did lots of aircraft and NASCAR stuff in the '80s-'90s. Don't really have the time, eyes, or hands for it much anymore. Really miss it. Still have a lot of stuff on the shelf. Maybe later... 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491629 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 Most of us have the same problem I’m fixing to take one of them out and work on it still seems easier to get out of here and belly ache ha ha….. Bob Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491639 Share on other sites More sharing options...
doubleclutchinweasel Posted March 11, 2022 Author Share Posted March 11, 2022 I gave away almost all the ones I built through the years. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491646 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 ya i did the same thing years ago then thru the years i bought a huge scale 49 ford.and a 55 chevy wound up giving both away still in the boxes unopened due to too many hours on the road...bob Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491647 Share on other sites More sharing options...
Freightrain Posted March 11, 2022 Share Posted March 11, 2022 673P with a set of screw on filters like I did to mine. Did a 711 come with twin intakes like the 673P? I remember lots of trucks getting the 4 square light treatment way back. I suppose they wanted to make their old truck look "newer". To me it looks odd and needs a single round headlight....but that's just me. 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491650 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 Yes me too although if I ever get to it I am going to get rid of the stock parking lights and put something else in there so far I still haven’t even driven the truck into the garage yet ha ha. … bob Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491653 Share on other sites More sharing options...
doubleclutchinweasel Posted March 11, 2022 Author Share Posted March 11, 2022 I guess what threw me on the engine is the lack of an oil cooler. I'm not used to seeing them like that. I think every one I was around had one. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491654 Share on other sites More sharing options...
Mark T Posted March 11, 2022 Share Posted March 11, 2022 2 hours ago, Freightrain said: 673P with a set of screw on filters like I did to mine. Did a 711 come with twin intakes like the 673P? I remember lots of trucks getting the 4 square light treatment way back. I suppose they wanted to make their old truck look "newer". To me it looks odd and needs a single round headlight....but that's just me. How about when guys would put the headlights from an Eldorado or Toranado ( when they were front wheel drive at first ) I remember that too. I like one big round like they're supposed to be Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491665 Share on other sites More sharing options...
Freightrain Posted March 11, 2022 Share Posted March 11, 2022 1 hour ago, doubleclutchinweasel said: I guess what threw me on the engine is the lack of an oil cooler. I'm not used to seeing them like that. I think every one I was around had one. My 673p had the brass bypass tube just like that one so I'm familiar with it. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491668 Share on other sites More sharing options...
doubleclutchinweasel Posted March 11, 2022 Author Share Posted March 11, 2022 12 minutes ago, Freightrain said: My 673p had the brass bypass tube just like that one so I'm familiar with it. Thanks, 'Train. I learned something else today! 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491671 Share on other sites More sharing options...
mowerman Posted March 11, 2022 Share Posted March 11, 2022 OK first step took the box down out of the closet and yes it’s very dusty and this is about all I have done so far I did paint the fuel tanks black and the radiator guard not shown… Bob 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69355-what-exactly-is-this/#findComment-491672 Share on other sites More sharing options...
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