I need help with my first Build. I bought a 1955 Ser.2 GMC and the guy gave me a block to build. I need to know what Cam to buy. An what my opions are on building this block. The Deck is 9.500, Bore is 4.155 on this Dart 400 small block Chevy. And it takes a Big Block Cam (raised .391) The cam is a Raised .391 BBC type. Hear is a link about with the same Block. But It does not help me.http://www.foundadeal.com/ebay2/dartheads/dart.pdf If any one can help me and give me tips It would be great. Kevin