Jack Halton and others on Inliners have lots of good GMC info, Jack post here by the name of Sixpack.Jim Proffit knows something too, but he's vacationing in Europe at the moment I think.
What Bill Fisher said was before 100 million Chevy V-8's were produced,today a GMC cost per HP is 2 to 3 times that of a smallblock V-8 if you can find the GMC parts in the first place.
