Manual Transmission Advice.

AJ/FormS said
I think so, but I don't know so.
In any case trying to find one could be tough, whereas the 64/65 keep popping up

mbaird said
64 & 65 do ...but not 66 IIRC. Which I should since I just went thru this 6 months ago. But my memory is what is used to be...lol

A chart from Alpar

A-833 Transmission Gear Ratios 1st 2nd 3rd 4th
6-cyl (also 64-65 273, 74-75 318) 3.09 1.92 1.40 1.00
Fine-spline V8 (most pre-1971) 2.66 1.91 1.39 1.00
Coarse-spline V8 (1966-70) 2.65 1.93 1.39 1.00
Coarse-spline V8 (1971-74) 2.44 1.77 1.34 1.00
Road Race T/A; most 1971-74 fine spline 2.47 1.77 1.34 1.00
Overdrive (mid-1970s and newer) 3.09 1.67 1.00 0.73