I have a new in box cam and I was wondering, are these lifters any good? I found them on Summit's website.

 

A friend and I just installed a set of those in his 350, along with a Summit 1103 cam. Hoping to first-fire the engine this evening to break-in the new cam / lifters. We used COMP lube instead of the black moly paste, he bought a 5-gallon jug of Quaker State Defy oil with ZDDP in it, and I poured in a small blue bottle of STP additive with ZDDP. Planning on 1500-2000 RPM for 15 minutes, varying the RPM constantly. I'll report back if we wipe a lobe or dish a lifter crown. Or both.

 

First-fire got interrupted by fuel-delivery problems, but even so, break-in went well, steady vacuum gauge reading, runs strong, sounds as it should. I'd call these lifters good enough, so far.

 

Stock replacement SFederal Mogual/Sealed Power lifters.

Fine for a mild rebuild.

Soak them in fresh oil overnight before installing helps.

 

Dunno about the OP's application, nor your definition of mild, but I must call these results "performance" rather than "stock".

 

Not sure what results you are talking about.

Those are stock replacement lifters.

Sure they can work in nonstock applications, but they are likely to pump up in a high rpm application.