I did a set of DLC Pontiac lifters using Calico in North Carolina. They turned out pretty good, but they are expensive. By the time they do all the masking, etc. it was about $50/lifter.
If you do it, you have to disassemble the lifters and clean them and serialize them to match the internal parts so you can reassemble them with the original plungers. If you get them mixed up it’s a problem. You ship them just the lifter bodies and they ship them back coated.
DLC is super hard, very near 100 Rockwell C. You don’t need to bother with break in springs, just run them. I also Nitrided my cam so not expecting any wear from this setup. Be nice if Comp could do this as an affordable option for Pontiac.
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1964 Catalina 2+2 4sp, 421 Tri-power
1965 GTO, Roadster Shop chassis, 461, Old Faithful cam, KRE heads 305 CFM,
Holley EFI, DIS ignition.
1969 GTO 467, Edelbrock 325 CFM, Terminator EFI
1969 Firebird Convertible
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