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357 Posts
There is this gt I want to buy, the fellow is telling me he had a 68 4 bearing head rebuilt with 1.74 & 1.5 valves with hardened seats installed, he used the 4 bearing head because it would turn higher rpm's ( more stable, ok) and was a higher compression head (I thought all the comb. chambers were the same cc's throughout the years). He is telling me this as a response to my question about the year the head is. My concern being the 4 bearing, 12 bolt head notorious for cracking on the late 72 & 73 heads. Has anyone heard of a 68 4 cam bearing head that gives higher compression? I would see for myself if it was the 12 bolt head but it is too far away. If it were a 3 cam bearing head, is it impossible to make it a 4 cam bearing head?