[P@blo]

About the iron chilled bottom lifters, Do these have to be matched with a cam that is hardened/hard faced as well ? Here is a blurb from Isky's web site.

"Isky Chilled Iron Solid lifters are compatible with our hard face overlay series cams only (not for cast billet type cams). Hardened by the chill-plate method which produces ideal surface grain structure, they are the only flat tappets that will survive in the grueling environment of today's funny car, fuel-dragster and competition engines."

Is that why everyone is running a standard Johnson hydraulic lifter and can find nothing regarding this on the forums other than what was posted by Hard Timess. Any ideas ?

Thanks