MuddyMudskipper said:
I kept thinking the same thing.....like "How hard would it be to put a
Navistar Diesel there?" Navistar provides motors for all of Ford's Super Duty trucks so I know they make good power and have TONS of aftermarket goodies.
I suspect that the biggest hurdle will be importing and dealing with all the associated paperwork. Russians never bothered with US DOT certifications or emissions compliance for any of their army trucks. If it's 25 years old it's exempt though.
As for diesel, I'd go with the russian D-245 simply because it's a direct bolt-on. One of the new versions of this truck uses this engine. This is a very popular engine for Russian commercial trucks.
Navistar can be installed in GAZ-66, but you will have to come up with a custom bellhousing which will likely cost you 60% of the complete D-245 setup. Besides, Navistar is much heavier than the original V8 gas engine and makes a lot more torque. I doubt that russian gearbox (and transfer case) are going to last long with the engine that makes 50% more power and 100% more torque.