Hot engine won't start?

More progress.

After going over the pulley setup numerous times, concluded there HAD to be a seam somewhere, if only I could find it. No way to assemble it otherwise. Turns out the cap screws were only holding a plate on in front......not the entire pulley. Seam was on insider corner. 

As it turns out, didn't need to do anything to pto shaft / yolk / u-joint. Just remove those 4 cap screws. Now I know. Now we all know. Next one will be easy.

More progress and hit yet another wall. 

With the right puller, the big pulley walked right off just like  harmonic balancer would. 

As feared, corrosion around that broken bolt may have the cover welded on tight. I thought maybe if i got it freed on one side, I could wedge it off. Is free on top, left side and bottom Entire right side is stuck down tight. Have driven wedges in, banged on cover and bolt.....rise and repeat......and no joy. It has hit the wall. 

Trying to free it around the fuel pump damaged the cover to point of no return. It's toast. Have given thought to drilling a hole in the cover to the bolt.......say 3/16" or so......then filling that with PB Blaster and letting it soak a bit in hopes it might give it up......or just quit the subtle stuff and get out a saw and start hacking it up. 

Had to quit early and unscheduled field trip all day tomorrow. 

As stands now, drilled the hole thru cover above the bolt, and have been irrigating with PB blaster. Sitting under serious tension with driven in wedges above and below. If it doesn't give it up in a day or two, will pull out the Fein multitool and start hacking. Get on the edge of that bolt and ride it to the bottom. 

Widely believed the Deweze version (this one) left factory with engine, tranny, front and rear axles same as Dodge D600. The rest was fabricated and grafted on. Spoke to the young man I bought this from and he replaced the original factory engine with a used 318 engine sourced from a salvage yard.  He had no idea what it came out of. It has an odd casting number.........xxxxxx-318-16. The 16 part is where numbers vary depending on use. Nobody seems to know what a 318-16 was intended for. Aside from cars and trucks, we know they were used in a whole slew of military vehicles, RV's, boats, irrigation pumps, Oliver combines and who knows what else. Some floating around were just spare crate engines, which is what this one may have been. 

The MOPAR guys gas on about cams, headers, carbs, etc., with most of them interested in high RPM horsepower and if it will hold together above 6,000 RPM long enough to smoke the tires off. At other end of the spectrum would have been that Dodge D600 truck. High torque at low RPM's not intended for high road speed. (Not a muscle car). Carb, headers, cam shaft all optimized for that use. That would be ideal for this rig, but not sure how close it matches......if at all.  It does have same NP 540 transmission, but only single speed rear axle.  So the geared way down, high torque setup. 

If i was to go on a hunt to replace engine, I'd be looking for a donor from some form of Dodge D600 truck. Actually have a line on one in form of an old firetruck, which is sitting in a salvage yard. Some of these D600 trucks were retired with less than 30,000 actual miles. 

Cover is off (and it wasn't easy) and broken bolt is finally out. Had to hack up the cover and once inside was very plain to see, corrosion to the bolt was holding it on. No amount of heat or soaking was going to free it up. Had to go postal on it. Once cover was off, the bolt backed out easy with vice grips. 

Once inside, looks to me like timing chain is suspect. Good amount of slack in it. If going to replace, no time like the present. 

Have given thought all manner of fixes.......everything from a hard plastic bolt.....some sort of ceramic coating, etc. Cheap and easy might be to butter it up with Anti-Seize before installing. Once installed, this one bolt would be the only one of several that would ever have to turn. It is one of three that is used to hold alternator bracket on, but this one also does double duty, being lower anchor point for the arm used to adjust fan belt tension on alternator. Anytime the fan is adjusted, or to replace the belt, that bolt has to turn. Somewhere along the line somebody tried and broke it. 

And again, it does extend into the block where end is exposed to coolant. Some design engineer screwed the pooch on this one.