I once saw a 2.8 V6 from a Camaro in a 80's C-10 pickup ..
It looked like it was so far back you could put another one in front of it!..
Don't ask me how the guy mated it to the TH350 ,unless they had the same bell housing as a SBC,I couldn't see well enough to tell if it had any adapter --maybe he used the transmission from the Camaro too ?..
When the guy drove off,he smoked the back tire on one side for a good 40 feet and the thing went down the road like a jet..
I was surprised it had enough balls to just propel the truck,period!..

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I saw another farm truck someone swapped a 2.5 Iron Duke into ,from a 70's Chevy Monza..it was not a very powerful rig,but it still hauled hay around OK..it had a SM465 too..