That’s correct........ but if you have a cam with say .500 lift....... the inner step and outer step on the retainer both move .500”......... and both inner and outer springs get compressed the same amount.

Also, the diameters listed look to be “inside” diameters.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads