With the M-20 trans and the 3.73 rear gear, you're already equivalent to an M-21 or M-22 with a 4.27 rear gear. Running a 4.56 rear with the M-20 would be equivalent to a 5.22 rear with a close ratio trans. First gear would be a screamer.
Last edited by COPO; 10-26-2019 at 03:43 AM.
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