a '93 is better from the fuel system standpoint as it is still a DB series mechanical pump, '94 & up used a DS pump which has a electronic control system that was lets say less than robust. I'm a bit jaded as I've worked on all the G.M. diesel since I started in 1980. I can't say as I would swap one for a small block V8, would be a step backwards IMHO, I'd stay with sbc or go to a LS engine.
