what gears 7 1/4

Well, just to add my two cents to this old thread:

Rear gears in my 63 Valiant, factory 225 with Torqueflite, are 2.93. My old 65 Valiant 170/3-speed manual was 3.23.

This is an oversimplification, but generally, early A 7 1/4's are 2.93 (2.94) or 3.23. Later A's, 2.76's were probably the most common.