In the 2002 Mopar Performance catalog the 590 cam (P4120663) calls for a P2806077 spring. That spring is:
1.52" diameter
1.86 installed height
135 lbs on the seat
405 lbs open
made of .216" wire
so the 1.55" spring look closest. And I would want 1.55" springs anyway because that's what I have retainers and cups for.

Last edited by rickseeman; 10/01/22 05:55 PM.
2011 Drag Pak Challenger