the reason i like the 4.3 so much is that they use 350 parts most of the time.such as pistons berings and other parts.granted cams are a little more expensive but comp cams will grind anything ya need or want for the same price as one off the self.i have mine in a 79 MGB,and boy does it run,hell i can even put a 454 tbi on it if i have the manifold bored out.im also running a 4L60 tranny!neddless to say its kinda quick.