doubleclutchinweasel

What he said. IIRC, the 400 and 500 are the same in mounting dimensions. http://www.bendixvrc.com/itemdisplay.asp?documentid=4384

That is an interesting perspective. I am a Mack guy. But, for my money, it's hard to beat an Eaton-Fuller RoadRanger transmission.

This topic comes up on here all the time. The opinions vary from individual to individual. About the only thing that is generally agreed on is that the Eaton-Fullers are cheaper to repair. There are a LOT more Fullers out there than Macks. Both work. Like anything else, some people have better luck with one than the other. Here's one of many discussions...

Go here and learn all about the 6.0. Not as bad as people claim. But, these guys have a lot of expertise, and can hook you up with some good parts that will remedy most of the issues a 6.0 can have. https://bulletproofdiesel.com/pages/bullet-proof-your-ford-6-liter They can do anything from a full delete, to an upgrade of the factory smog parts to keep it smog legal. I know of several people who have fixed troublesome 6.0s with these guys' pieces, and they run like a champ now. Know of a couple of guys who did the upgrades before they had any issues.

Could that be an actual Mack compressor???

Here's one Mack image...

1. Replace Heli-Coil in existing hole if hole is good. Easiest to try. 2. Instead of Heli-Coil, look into a "Threaded Insert". Takes a larger hole than a Heli-Coil, but can be considerably stronger. There are several different styles. Plain. Loctited. And, staked. I have seen these use a "standard" tap of a larger size for the hole. But, most I have used require a special tap, similar to the way a Heli-Coil tap works. Incidentally, I have seen aluminum (and even steel) parts come from the factory with Heli-Coils already in them.

Should serve you well for many miles!

I sat down in one of those a few years back. The steering shaft angle appears to be different (steeper) than a B61 (flat-back cab). Yes, the wheel hit the stomach sooner, but seemed to miss the knees a little more! I guess you have to decide what body part you want the truck to hurt!

Wow! You even got one in my color! Congratulations, and enjoy!

I like black frames.

I think every B- and R-model any of the local crews had when I was a young'un had black frames. I saw others out on the road that had colored frames. But, to the best of my recollection, all the ones I was around had black frames. Not sure if any of the B's were older than 1960. But, I would suspect at least a couple of them were. Most of the B-model cabs we saw at home were red, yellow, or yellow with black fenders. I don't remember a single one of those having a chrome grille surround. First time I saw one of those I was blown away. Really set the front off. I guess they would sell you whatever you were willing to pay for! Nice thing is, what ever you decide will be great. If you want it body color, do it! If you want it black, do it! The little dog on the hood is what makes the truck anyway!

I have it in my big toes. Don't envy you having it in the knee. Switch to liquor. It isn't quite as bad as beer! Oh, and try to avoid deli meats! Colchicine is for reducing the flare-up. Allopurinol is for ongoing treatment & prevention of flare-ups. It has worked pretty well for me. Take care of yourself, and get better soon.

Agree with everybody. If they are in good shape, and the date code isn't something stupid, they will be fine. It's like I told somebody on here once before; after you leave the tire shop, your "new" tires are now officially "used" tires, too!

Asking about an engine swap will get you as many different answers as there are people who respond! The old mechanical Mack engines should be pretty straightforward. Like the man said, the water pump might have to change to make the length work out. The turbo version of your engine (ENDT-673 variants) would be pretty simple. The 237 Maxidyne (ENDT-675) is awesome. But, as discussed many, many times on here, the Quadruplex (or any of the single-countershaft transmissions) might not be the best bet behind a "high torque rise" Maxi. There are transmissions out there (Mack and others) better suited to the torque curve of a Maxi. And, as they said, there are bigger Maxi's to choose from, too. My '70 had the 250 HP ENDT-673C Thermodyne and an RTF-915 15-speed Fuller RoadRanger. From the build sheet, it appeared there were quite a few parts unique to putting the fuller in a Mack...primarily in the clutch housing and its mounts. That one also had a top-hinged clutch pedal with a cable-operated Spicer 2-disc clutch. So, there were several pages of stuff on the build sheet that were related to putting that trans and clutch in that truck. The '67 R611 I drove when the world was young (and so was I) had that same 250 Thermodyne in it backed by the 18-speed Quadruplex, and used the old "down through the floor" clutch pedal that looked just like the B-models we had back then. As with any project, if you can get all the peripheral parts, or even a donor truck, it will save some hunting for the bits and pieces. Lots of guys on here have done these swaps, and will have far more in-depth knowledge than I do! Good luck on the project!

Brocky is correct. This was taken a few years ago at "Brad's Farm" near Maiden, NC. If the date stamp on the picture is correct, it was in 2013. Funny, I didn't think it was that far back, though. "Ain't it funny, how time slips away?" Here are a few more shots from later (2017), with the grandsons (AKA: The Horses) hanging out with it.

That's the sequence we used (most of the time anyway) on the 20-speed (main direct in 5th). On the 18-speed (main direct in 4th), skip Lo-Split 5th and Direct 5th (they duplicated other gears). So, they were the same up through Hi-Split 4th. Then you just shifted the main to 5th. Long-legged mothers, those 18-speeds.

https://www.4statetrucks.com/exterior/semi-truck-jones-performance-fiberglass-hood-mack-r-model_14502.asp?gclid=EAIaIQobChMIyNDyyeqo7gIVE_zjBx04vwWhEAQYBCABEgK2tfD_BwE Mentions that this hood will fit '82 and older if 1" is cut off the back. https://bigtruckhoods.com/collections/r600/products/mack-r600-new-non-oem-hood This one says '82 and later. I know there were 2 different R600 hood lengths. Have heard it is 1" different, 1.5" different, and 2" different! Both of these "new" models say 54-1/4" long.

Nice...

https://avspare.com/spare/volvo/13qc421/

Mack trucks and Cat tractors. Takes me back...

New Bus Smell. Been a long time on that one, Bob.

Did you ever figure it out? Bad treadle valve or a stuck pedal hinge?

Good tip on the technique!

The R that I drove most of the time when I was young (and the world was too) was a '67. The interior was about that same color of pale green. Always reminded me of the inside of a school bus. The later ones we had were darker...more of an olive drab color...and more of a flat finish. I think the '70 I had was that darker green...before somebody painted it white. Apparently, the color changed sometime between '67 and '70. Looks like the throttle knob is missing. Sure hope he can find an original one to match the fuel shutoff. They look a lot better than the plastic replacements you see so often. Is that a pyrometer in the center panel? Really like the padded panels at the top of the doors. The paint always got rubbed off right in there. The diamond plate headlight panels are great, too. The look like a factory upgrade! Matching pieces on the door jambs look cool, too. Looks like it could use a long-eared dog! I changed many a filter in that old-style "oil clarifier" canister! I was surprised that I could still get the filter cartridge and the seal for mine when I had it. The check valves on it leaked down, though. Made it kinda tricky to check the oil level! He sure has a nice ride there. I'd like to see a lot more info and pictures for that one. Please pass on my appreciation (or it it jealousy?) to him. Looks like a lot of work/time/money invested. Kudos!