Hold on there sonny, I just looked at your profile, you have listed ~ 1960 GMC (parts) 1964 chevy (project) ~ Your going to find that there are "NOT" too many parts on the GMC you can use on the Chevy, if your builting a 64 Chvey your going to want 64-66 chevy trucks for parts.
There are way too many differances to list here.
The stock & only engine offered in GMC pickups in 1960 was the 305 V6. If it does turn out to have a 327 V* then it's a transplant.
