[60-66 Nut]

If it's '82 or newer then it would be the 6.2 diesel, which should not be a bad swap. '81 was the last year they put the 5.7 Olds diesel in the trucks, but I don't think they put them in the 4x4 trucks anyway.The 6.2 trans will bolt right up to any Chevy V8, just use the flywheel for the gas engine. The motor mounts should also bolt up. Exaust, of course would have to be hooked up. Some of the 6.2 diesels used an electric fuel pump, but I'm not sure which years had it. That may need to be removed, if it has one. The filler necks should be fine. The power wire for the inection pump should hook up to an HEI distributor. Oil and temp sender units from the 6.2 should work, but there might be some adapting required to fit them on some gas engines. Simply abandon the glow plug system completely. The diesel radiator should be big enough for even a big block gas. The diesel probably has hydro-boost brakes, just use the diesel PS pump with the gas ps brackets. I'm sure I forgot something but I think that's the biggest part of it anyway. Hope that helps, best of luck.

60-66 Nut