If your going to use the 3100 behive springs you have to use the 3100 behive retainers NOT the 2.2 2.5 retainers. You use the 2.2 2.5 retainers with the mopar performance springs, both the mopar springs and 2.2 retainers are a lot more than the 3100 stuff.

The mopar stuff can handle a bigger cam but under .500 lift and modest RPM I have had good luck with the 3100 stuff.