Largest cam on eddy springs!

The problem is not lift, but pressures. The Edelbrock springs are good for some modern grind cams (meaning fast rates of lift) up to like 240° @ .050. After that, most cams need a better spring. Howver, if your head guy is savvy he can order the inner springs from someone to create the right pressure. Or simply use the cam manufacturer's springs adn the Edelbrock retainers. That's what I do. I have yet to use the factory springs on those heads.