So I commented that I am interested in lookong for a 348.
I based that on the previous owner saying it was originally a V8 truck. Looking at the specifications pdf from GM Heritage Center, I am not actually sure which V8 it would have had. When I can get out to the shop, I need to pull the numbers off the data plate. I seem to recall seeing a link in another thread to a calculator that translated those.
In the short term, I want to get it moving under its own power so I can spend weekends doing projects on it with my son. Long term, I am considering doing a 4x4 and/or IFS swap on it, but I figure that is a couple years out. I am still buttoning up my last project but I could not turn this truck down for the price.