what size cam???

:notworth: You don't need dual springs, rod's etc. You need a cam, lifters, flat tops, recon rods, and head work for a low buck street rocker. If your going racing forget it. you need to do much research and big bucks, you didn't state ;your financial situation. but for under 600.00 If you have an engine that doesn.t need bored you will have a mean street machine, if you take your time, read and do your own work. ( PS you don't want to spend the money on a 727 if you have a 904 for the street. some articles say you loose 20 HP to the rear wheels going through a 727.) Put a shift kit and rebuild the 904.)