Zinc Rich Oil for Flat Tappet Cams

DrCharles said

Ah, the old 509 (or hopefully the newer 509 with the 114 lobe centers instead of 108). Your plugs and the guy behind you will appreciate it :)

Sounds like a reasonable spring, just make sure it fits everywhere (spring seats, valve guides, retainers, rockers, coil bind...)

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Well it's the old skool 108° lobe center. Rest of my car is set up for it I think. KB flat top pistons, X-heads,holley strip dominator intake, thermoquad that has been tweaked for more output and 3.91's in rear. 727 transmission with a 9.5" FTI 3400- 3600 stall converter. Car is a dodge dart sport 360.