Originally Posted by chevytruck345
i am rebuilding my 350 engine. I am having it bored 30 over and putting roller rockers with a camshaft around .437 lift. The machine shop told me to get valve springs with seat and open pressure one step up from stock. Do you think 80 pounds seat pressure and 200 pounds open pressure will work? I am using the engine for street performance.
Competition Products # 98111 might be a better choice. They're 90# @ 1.7" installed height on the seat, 240# @ 0.500" lift- so would be slightly lower at your 0.437" lift.