Hi guys and gals,
A good friend of mine has been doing nothing but piston rings for antique cars trucks and tractors for nearly 30 yrs.
Paul Weavers Garage. 680 Sylvan Way. Bremerton WA 98310. 360/373-7870
He goes stricly by bore and over-size and ring width. So he can build anyone a custom set. But he needs to know all the data about your specific engine. When I rebuilt my 1966 Datsun inline 4, I could not find anyone with pistons and rings etc... but he built me a set and I was fortunate to just re-hone my block and reuse the pistons. I now have over 10,000 miles on that rebuild, and they are doing just fine.
Hope this helps, Garry K