Inliners International Forums General Discussion Engines How thick are standard main bearings...

For a Chevy 230? And rod bearings as well? I just rebuilt my motor and got very little oil pressure. I didn't go all out, and I thought my old bearings wern't marked as over-sized, I put standards back in. I guess I'm looking for advice before pulling it back out. The old bearings have these marks on them:
Mains-Clevite 77
9 88
MB3o10PL
or
M8046PL
s1

Rods-MICHIGAN 77
8 87
CB745P
E1

According to my mike, my old mains are 0.100.5 thick and the rods are 0.067 I understand that these are worn, but does that sound like standard or over-size?
I probably should have asked this question sooner.
Thanks