The diameter of the spring has nothing to do with how much pressure it has, there are 1.46 diameter roller cam springs and others of the same size for two barrel stock motors shruggy
On your deal I would buy and use a spring that would have between 120 to 150 lbs. on the seats and between 300 to 375 lbs. open pressure wrench scope twocents

Last edited by Cab_Burge; 10/01/22 03:59 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)