Quote Originally Posted by Supercharged111 View Post
The Vortec truck motors are dirt cheap and run circles around the older stuff. Still GenI too no retrofitting, just need a compatible intake. They use more modern gaskets too and leak a lot less.They come as a 305 or 350. IMO once you yank those garbage heads the originalness is gone so why keep the 307 in there?
OK - what year did the Vortec 305/350's go into the trucks? And what years use the old style intake manifolds?