You can get the A-5 with a .79 OD option.
For your application, I'd go with the TKO 600 and with the lower rear gear, I'd stick with the .64 OD.
In my eyes, I see the A-5 as being a very nice transmission for the small block Cobras that drag/road race as they are lighter transmissions and you can shift them quicker at a higher rpm.
For a big block street/strip Cobra, I'd go with the extra beef of the TKO transmission.
An FE with a T-5/A-5 just doesn't look right...
