273 piston rings

Where can I get piston ring set?
Bore is 3,630" with standard 3,625" rings there is too much cap.

I would like to find correct size ring, can someone help or give a good advice.

I am now rebuilding my 67, 273 , 4bbl, 4 speed engine. Pistons are original, in good shape, cylinders are good as well.
Compr ratio 10.5:1.



Plese give your comments.