Hey yall i have been looking at buying a set of c3 yates heads for my 69 351w stroked to a 408. I have been told i have to go with 4.125 bore block so the valve is not shrouded by the cylinder wall. In my terms (means the valve hits the side of the cylinder wall). Is this true or can i run them on my block? Any info yall can give me would be greatly appriciated. 
Also if anyone nows about an efi intake for yates heads too. If this works out i will be selling my 185 stage 3 ported AFR's and my stage 2 ported TF 351w intake. If anyone might be interested. I just want to build something different that will make a lot of power. Still tossing the idea in the air so yall let me know what you think.
Also if anyone nows about an efi intake for yates heads too. If this works out i will be selling my 185 stage 3 ported AFR's and my stage 2 ported TF 351w intake. If anyone might be interested. I just want to build something different that will make a lot of power. Still tossing the idea in the air so yall let me know what you think.
