3.25:1 & 3.55:1 with a T-5 is considered near perfect ratio if you drive it  alot on the highway.
3.73:1 & 4.11:1 for around town/cruise in and occasional trips down the drag strip.IMHO
Sounds like UR there! (maybe a trac-loc to help with wheel spin when you DO occasionally tweak-it!
If you swap to something stiffer.........let me know I want some 3.25's
6s6

We need a video to see/hear this street terror!!!!!

Last edited by 6sally6 (11/04/2020 9:40 AM)

I would go with the 3.25's.  I drive much the same as you and would like that ratio rather than my 3.00's.

Also, by all means get a close ratio T5.  The 3.35 first gear in the wide ratio box will be almost useless to you.  I have a 3.35 and hate it even with the 3.00 rear end.  The close ratio box with it's 2.95 first will work much better. 

A long time ago I had 3.25's in the rear with a 2.95 top loader.  It worked perfectly.

First will be short with a gear ratio above 3.25:1. with a stock 3.35:1 ratio first geared T5 (Fox era V8 trans).  I run a 3.50 in my '67 and don't find it so short its objectionable, but I also have fairly tall rear tires due to the 17" wheels.

My '89 has 3.73s, but will be using a 2.95 1st geared T5 (Astro gears), and that should be about perfect, especially with an engine that will wind to or past the stock 6,250 rev limiter. 

On a typical small block that's done by 5,500 a 3.25-3.50 is a good choice with a 3.35 first.  If it will wind higher you can go to a 3.73, but I consider 4.10s too tall.  I used to watch all the Fox cars at the strip and I could tell what rear gear they had by where they had to shift into 2nd.  The 4.10 cars barely made it out of the hole, and actually ran slower than the 3.73 cars because they needed 4th at the end of the track and crossed the finish line out of peak torque in direct drive. 

FYI, the reason they made the Z spec T5 was to both reduce the first gear ratio for use with a performance rear gear ratio, and better space the gears.  The stock Fox gearing was designed to use low rear gears for CAFE numbers while still allowing good acceleration in 1-4 gears.  One of the first mods a lot of guys did was to change the rear gears, but they found out it made first gear too short if they went too tall, and exacerbated the gear spacing issue with the stock gears.  Ford Motorsports had a version of the T5 built by Borg/Warner that fixed these issues, and that became the Z spec you can still buy new from Tremec.