[ElGracho]

Motormounts and bellhousing for the 6.2 are the same as other Chevy engines. Very swappable. Fuel lines on an 87 cab and chassis with a diesel are very close if not exactly like a carbed truck from 86 or earlier. Same with the fuel tanks but you may want to do more than flush them. They are cheap to just replace (about 100 bucks a piece) so you may just want to do that to prevent problems down the road. If you want to just use them, make sure you install a fuel filter that's easy to get to in case you end up with some crud dropping off the inside of the tank when it gets gas in it.

I can understand wanting more power than the 6.2 has for a big truck, but you're gonna hate the mileage...