[JLMounce]

I know people say you can do it, but adding new lifters to a used flat tappet cam is inviting lifter and cam failure. Those cams are typically delivered with a somewhat rough surface finish that aids in mating the cam lobe and the lifter together. When you add new lifters to an old cam, it's less likely that the lifter will properly mate to the older cam lobe.

Add in the known issues we are seeing with lifter hardness and overall machining quality these days, it's not a wonder those lifters look the way they do after very little run time.

We all want to save some $$ where we can on our projects, but with a flat tappet cam, I'm firmly a believer that if you're doing new lifters, you better be doing a new cam and vis versa.