mercman I have read many of your post. You always know what you are talking about. I just noticed you are from Texas now wonder you are so smart. I am from C.C. Tex. I have another guestion for you. Someone butcherd my intake manifold and I need to replace it what would you suggest.I am putting flat top pistons, bullet roller cam, roller rockers, 750 holley,

B one, My strength is not in engine building, but I will say this. Pick one with good midrange torque. Mid range torque is very important in boat motors. Hope this helps.
Jim

B one , had another thought, brass cross over. Since you are in salt water get one for marine engines with brass water cross over. The stock one may work as good as any.
Jim