The .86 overdrive should work fine with the 3.38 ring and pinion.
That 3.38 would not be ideal with a .73 overdrive. You would have to reach 70 MPH before you shift into 5th gear.
The 3.38 will also make that steep first gear more useful.
You will be floored how a T-5 wakes up a Stovebolt engine. Every time you shift you will be in the optimal powerband of the engine. No more lugging after every shift, then make the engine scream before the next shift so that it doesn't lug again.

Last edited by 52Carl; 08/01/2021 3:06 AM.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission