The original cam that came out of the 83 indmar 454 in my 83 sleekcraft went flat on the exhaust lobe on #8. After a complete rebuild and one short season I tore down my 454 and found the same lifter worn on the same #8 exhaust. The lobe looks good. The lifter bore feels good with no burrs and the lifter slides and turns just like the rest. The cam is a comp Hyd [email protected] in a 10.8 454. Any Ideas other than the lifter isn't spinning enough. Can I get away with replacing the lifter for one more season or shold I replace the cam?