[FireSale]

Re-read post #2.

Start with your cam card recommended spring pressure. PAC and Manley make hundreds if not thousands of different pressure, height and configurations from several different spring steel alloys and processes (PAC alloy, "Super Clean" ect.). Find out about those and work from there. Don't forget valves, push rods and rockers. Make sure everything's going to be happy in there.

I spent months on this before deciding on AFR 8001 {PAC 1225) springs for my SBF.