Originally Posted by sr4440

That's what i run in my B1, 290 seat 835 open. so far no issues in 4 years. FWIW I run T & D shaft rockers on that set of B1's

Joe
Nice to hear. Thanks for the experience.
I have the T&D rockers also, small shaft with a pair of rockers per cylinder. B1 original 2.30"/1.78" valves
My spring pressures are close to that too, small amount less with 0.816"/0.799" lift.
Affordable, seem stout (and heavy), and readily available stocking pushrod.

My last engine had 3/8", 0.120" wall pushrods. Indy CNC 440-1 heads, T&D rockers, 0.750" lift, 290/680 spring pressures. 7400 rpm (but smaller/lighter intake valve)
This new B1 572 CID will be shifted lower.

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1