Question on engine parts interchangeability

[Cartravel]

The cam bearings I ordered were standard size (both times). The rings I ordered were for 0.030 over 3 3/16. Filing rings to fit is not uncommon in an engine assembly, but I've never been told not to do it.

[Cartravel]

Originally Posted by Walt Dupont--Me.

I feel bad about all the wrong stuff you got for engine. Walt

No reason you should feel bad. I've messed with old cars enough to expect a learning curve. I just appreciate having this group to ask questions of.

After looking further I believe the oil rings were 3/16 in the 8BA, but 5/32 in the 59AB. The rings I bought clearly state for 39-48 in the catalog, but apparently I got later ones anyway. It looks like the parts supplier sabotaged me with both the rings and cam bearings.

Could my piston grooves be machined to 3/16" width? I still don't know why moly rings cannot be filed to correct the end gap.

I don't believe I have the "green bible". I have 39-48 Service Manual and probably a dozen other books and manuals. I haven't run across the difference in rings. I guess this is one way to learn.