i have the 619 lash caps, but 7 degree locks and retainers on my motor. the locks are not recessed and the cam is a crane hyd. roller 610 and 574 on the intake (1.7 rockers on the corners and 1.6 on the inside valves) and .555 exh. my ? is do i need to change the retainer & locks to 10 degree on this setup? street sometime strip car. thanks, dave