My 70 Z28 was running ok with a little noise from around #6 cyl. It had 83,000 miles and had never been rebuilt (original block/heads/etc.). I disassembled it and found that #6 piston was marked up from a washer or something else? Probably could have honed the block and got it going but I want to do it right and completely rebuild this engine with original components.

My mechanic has some NOS pistons, rings and cam bearings still in their GM boxes. The numbers are:

Pistons - GRP 0629, PN 3942543 on box, 3942548 on each piston. (.030 over)

Rings - GRP 0643, PN 366291

Cam bearings - he has several of these from GRP 0539 and I need to know the right #'s

Does anyone know if these are the exact and correct original replacement parts for my motor?

Or anyone else have the correct stuff to sell?

Thank You for any input!

Go over to Team Chevelle and ask Gary, (GOSFAST) for help as well as over to Little Brother, (Team Camaro), and ask there too...

Mike, (aka, Wolfsplace), may chime in too as well as BillK and others..

CarlC too........... Both sites...

pdq67