Mopar R1 block

12swinger said

Is 4.100 asking to much? Idk I’ve heard people have certain x blocks at 4.165 and would go 4.180
Or just leave it alone and take it from 4.040

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Have never heard of an X block going further out than 4.125, and that is super pushing it. I had one at 4.100. Some of them won’t go anywhere near that even, without getting thin.