[Walt Fricke]

Rosco - well, main bearing tolerances aren't unreliable. Where did you get that idea? It seems Glyco rod bearings for some years were unreliable - mine had quite excessive wear for very little engine hours, like under 10. But there are ways to get bearings which meet specs - like Clevites, or expensive actual Porsche sourced bearings. Perhaps Glyco has remedied this, perhaps not.

But nobody has been complaining about the Glyco mains. And you can measure whatever bearings you get to be sure they are right. Same with the rod bearings, of course. You can use your measurement instruments to confirm things before assembly, and the squishy stuff to check clearances after a trial assembly.

But I'd sure advise against grinding your crank (an irreversible process, basically) to deal with bearing QC problems. What do you do with the next rebuild? Grind journal by journal?