h67st

That would be a cool truck, but with a 70 hp motor it's probably a real dog.

Here's a big hole R model but as you can see they did extensive bodywork to the cab.

Here's one photo.

Those rims are interchangeable on the hub, only difference is tube/tubeless. 20" rims look nice on a vintage truck but much harder to find and mount/demount tires. You definitely wouldn't want to put a lot of miles on a truck that has mixed tires like that.

We have a lot of farmers here with R models and Superliners, but I haven't seen any military trucks! Pretty neat.

Yours looks to be around 1-3/4", mine's only 1-1/2". Yours must be a heavier axle.

My '79 GMC K2500 had an add-on fuel tank with no return. You had to make sure there was plenty of room in the factory tank when using the add-on or it would pump gas all over the ground.

What is the diameter of the threads? I have some extras I could measure. Are your springs and cups good?

You could pull the gauge line off where it comes off the turbo, crank the engine with the shutoff pulled and see if oil pumps out.

If you do have a draw on the batteries, the regulator is the most common cause of that.

Right, you have to make sure after soda blasting you wash it down good--just plain water does the job. If you don't, then the paint will peel.

Geoff is right-when I used to work on Cummins, the 855s were over 3,000 lbs.

That B model looks to have a Clariben fiberglass tilt nose, you don't see many of those on this side of the pond.

Here's his obituary. https://www.sandhfuneralservice.com/obituary/Mike-Harbison

We watched High Ballin last night (it's on Tubi right now). Not a real good movie but lots of old trucks so that part was fun. I'd like to know what motor was in the Iron Duke KW, it had a different sound (maybe just an unusual exhaust system). Of course, lots of Jerry Reed music so that part was great. It was filmed in Canada so lots of spread tandems and snow...one mistake is that they would show one scene with lots of snow on the ground, then in the next it was sunny and green.