2.66 low gear vs close ratio

goldduster318 said

I thought that almost all A-body A-833's other than the OD's and some early ones were 2.66:1 first. I'm running a 2.66:1 first trans with a 340 with a 227/231 Hydraulic roller and 3.23's. 25.6" tall tires. Maybe I could use a slightly deeper first gear to be totally optimized for launching, but otherwise it's fabulous.

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You are feeling it, aren't you?
2.66 x 3.23 =8.59. This is a pretty tall startergear. It works for you because of the mild roller-cam.if you were to go up two cam sizes or so to 240*, you might be begging for more rear gear; perhaps 3.73s or better. If you had a flat tappet cam, you would probably be looking for 3.55s. If you had a 360, it would be a non-issue with that cam.

In 64 or 65 Mopar put a 3.09 low in that box, behind 273s. None of the gears swap around.
In 1970 IIRC the T/A set came out with the 2.47 low set.I think it was E-bodies only.IDK