Good quality 1.5 roller rockers?
First, the geometry check out near perfectly with arms perpendicular to valve stem at 1/2 lift.
Still using some 5/16" Erson pushrods I got when I first built the motor way back. The springs are the recommended Lunati dual springs #73195 402# rate.
Listed as Seat Load:
[email protected]" Open Load:
[email protected]" ....but they are installed at 1.67 so I'm not sure what the loads would be.