Hey everyone. My grandfather-in-law is trying to restore a 1940 1.5 ton truck and we need piston rings. Chevs of the 40's is back ordered. Can any of you share a place I can check?

Also, I have a 1950 with a 216 and the 1940 is also a 216. I see sites like LMC have stuff for 47+ trucks. Would the 216 rings be the same? If they are it might open up my options.

Thanks

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1950 Chevrolet 3100 5 window
Original 216ci and SM420 4-speed