What we did when using the Lunati 704, was shim the Crower 68404 spring to install at 1.550" with stock length Ferrea valves. This puts them around 125-130 lb on the seat and 310-315 lbs over the nose. The 68404 spring coil binds at .950", so this still leaves around .075" before coil bind with the Lunati 704 camshaft using a 1.5 rocker.
__________________
1978 Trans Am
Pump Gas 461 Stroker
|