Question about transmission possibility

[James]

Gear ratios are not to different form the mustang 6 speed as far as I can tell. The final drive can be lowered a bit to give you longer gears.
MT6
1st - 3.636
2nd - 2.375
3rd - 1.761
4th - 1.346
5th - 0.971
6th - 0.756
reverse - 3.545
final drive ratio - 3.90

1st - 3.66
2nd - 2.43
3rd - 1.69
4th - 1.32
5th - 1.00
6th - 0.65
rev - 3.32
final 3.31
with wheel size I calculate speeds to be:
1st - 40.33
2nd - 61.75
3rd - 83.27
4th - 108.95
5th - 151.02
6th - 193.97

Where can you get a nice tall Final Drive? Only thing I've seen are 3.90's and shorter. In fact the only thing that was taller was off the Legacy, haven't verified, but looks like a 3.55, which is closer to optimal.

 

[Henry]

Not a tone of options but the 06-07 WRX final gear is a 3.70 and is comparable. not sure about the Legacy final.