Originally Posted by MouseFink
Show me a valve spring that has 350 lb.open pressure and can be fitted at 1.750" and is 1.250" OD. You cannot can you. That blows you theory into the weeds.
Howards 98215, I use them all the time.
98215 Single with Damper 1.265 dia 115 @ 1.800 380 @ 1.200
@1.75 you have about 135#'s on the seat which works well for a solid flat tappet
There's also PAC1409's and Isky's 295D
All standard Stock Eliminator stuff.
At one point we were running 180# on the seat with Schubecks but we've backed off some.