I am getting ready to rebuild my 69 GTO engine. It has the 400 engine that originally came with the car. The car has #62 heads. I am having the engine bored 30 over and am getting new pistons. I want to buy forged pistons and wanted to know what kind to get. I was also considering putting a larger crank in the engine. Do you think this would be a waste or should i just put in a large cam in the engine. Also, what cam would make the engine sound throatier? any suggestions would help to steer me in the right directions. Thanks for your help.