Been running a solid flat tappet in my 451 for 5 years now. Engle cam, lifter and spring package. Broke in on Brad Penn break in oil, been running Lucas Hot Rod 10w-30 with a zinc additive since then. No issues.
Prior to this motor, I ran a hydraulic flat tappet in my 383. No issues there either.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
