I am planning on purchasing some Dart Iron Eagle Platinum Heads with 215 runners, 64 chambers and 2.05/1.50 valve size. I plan to use these heads on a 1957 Chevy Truck for street use that I want to run on pump gas. The actual motor is a 350 four bolt main that will be machined into a 383. So far I have an Eagle forged 4340 crankshaft and H beam 5.75 connecting rods that will be hooked up to a 400 TCI Super Street Fighter Transmission. My question to all you gear heads is what kind of forged pistons, cam, lifters, and rockers will I need or are these heads too big? I do plan on keeping with my original plans of using cast iron heads.