I am going to be putting new heads and roller cam in my 355 TBI soon. I want to run 9.1-9.5 compression in my engine. The heads I am getting are the World Products S/R Torquer heads and they only come in 76cc Combustion Chamber Volume. How do I go about figuring what size gasket I need to get the compression ratio I want. Any help or links the this info will be very helpful.