Quote:
Originally Posted by Bored&Stroked
If you can find .050 rings, then just file-fit them back to whatever size the bores need. I usually try to buy rings that are .005 over the bore size for most modern performance rebuilds - then hand fit them. On modern engines they are usually marked for the resulting bore size -- like .030, but then "file fit" is added - to denote that they are oversize and must be filed to fit the actual bores of the engine.
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+1 on file fitting .050 rings. I'd shoot for .012/.013 end gap. Googling file fitting piston rings will get you lots of information on how to do it, it's routine now on performance engines.