The crazyest engine trans setup ive ever seen was a 350 chevy shoved between the fraim rails of a Farmall Super M It has a 350 turbo behind the engine that goe directly into the original trans so he cound still use the pto. The tractor is used to rake hay much faster than it used to with the stock I4 .
Detroit 8V-92 in an older Sub Here's something I found on the net somewhere. A natural 8V-92 weighs in at around 2400lbs!
I just found this crew cab, one ton, 4wd, Ford F350 with a Cat 3208 and ten speed on e-bay. Looks like it needs a bit of work, but would be an awesome truck.