I run a 60710 lunati roller cam with comp 901-16 springs

FYI..comp 901-16 are a single with damper,drop on with stock seals and no machine work.

lunati springs are double with damper,need pc seals with machine work to go on the head.

been turning 6200 rpm with the comp springs,stock roller lifters/PR/rockers

no help on that cam in a 408 but you can save some bux on the spring if you go with the lunati roller cam.