Where can one still get piston rings for the old style TRW pistons for a 455 Olds that is .060 over?

 

Have you tried Summit? Jegs? NAPA?

The "old style TRW pistons" would have used stock ring groove widths and depths...right? So you need stock rings for a .060-over bore.

I would be looking for Moly-faced, but not everyone will agree.

 

Why Moly Faced?

 

WAY easier break-in than "Chrome-" faced rings.

More durable than junk "plain" rings.

 

Try Perfect Circle. they used to have a website, don't know if they still do.

 

Ditto what Schurkey said above; the TRW piston used stock ring grooves so a stock replacement in the appropriate oversize works. Any brand of your choice should be fine, Hastings, Mahle/Perfect Circle, etc. Type of ring face, cast iron, moly, chrome should be discussed with the person honing the cylinders so you have the correct finish for the chosen ring face. Moly faced are most generally used today.