Purple shaft specs help

[Moparallen]

Trying to make this beauty a little faster. Where can I find a cam card for a MP purple shaft .590 SBM cam? I know lift, duration, etc. what I need is spring height etc...
Thanx

 

[69Bee]

If you mean the 0.509" lift "Purple Shaft" (P4120233), the recommended spring is a P3614542, but if you do mean a cam with 0.590" lift (P4120657), the recommended spring is P3412068. Both springs are set to 1.6785" installed height. Unfortunately, none of my info contains the seat pressure at the installed height.