I run the comp 901-16 with my lunati roller cam

single with damper and drop on with stocl seals

been 6200 with no valve float

need to match specs of the suggested spring for the cam when swaping springs around

the comp springs were within 10# of the lunati doubles with damper and needed pc/seals and machine work to fit

choose wizly so you dont have a set for a door stop..DAMHIK