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how far backcut? .155? .170? what is the std d wall for your bore size on a 1/16 ring?

I`ll post that info when I know mid week as he`s sending the rings back to get the back cut stuff from Total seal.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....