Have an 85 Xtra cab 2wd sitting with bad motor. Have a 2002 Blazer with rebuilt moter and new trans sitting in yard got rear ended. Complete vehicle! How hard is the swap ? Will it work? If you can drop a small block why not 4.3.
You could swap in the 4.3. Its been done lots with the 4wd guys But I wouldnt do it even if I had your parts truck. They dont make that much power, and the PATS system is tricky to bypass. Lots of work for little power.