I need a good spring that will be good for max lift of 602. Scoggin Dickey has a good package deal with a spring thats good to .600- Our SD1423 valve springs are good to 0.600” lift.- Is that cutting it too close? I won't be spinning the motor too high 6400rpm max.
Or should I go with a CC918 0r 915's. I don't want to machine the heads, and want to stay away from REV's
Let me know what you all think.
J

 

with that lift i would run a double, may need to upgrade the heads to seat some 987's. I have dual rev 7716's waiting for my cam install.