I have a TKO 600 with the .82 OD in my 3.23 geared car and love it. Overall multiplication in 1st is 9.27 which is gods plenty in a big displacement, long stroke application. OD is 2.64 which is relaxed without 'lugging' or feeling the need to grab a deeper gear to pass on the freeway.
I originally had this trans with the factory 3.42 ring gear. 1st felt too deep - as in feathering the throttle way you much to control wheel spin, and OD was still a bit 'excited' on the freeway. IMO the .82 TKO 600 was tailor-made for a 3.23 ring gear, which is prevalent among the later 70s F-bodies.
P.S. - had a .64 main shaft originally and it dropped RPMs SO much that the car felt 'doggy' at speeds below 80 and if you did downshift at highway speeds from 5th (.64) to 4th (1:1) the 'jump' in RPMs was downright excessive. So I had the box rebuilt and blueprinted with the .82 main shaft and later swapped the 3.23 ring gear for the 3.42. TONS of real world R&D went into my arrival at the .82/3.23 combo. I love it. If you have a 79 WS6 car with a 3.23 rear (posi, disc brakes) you will never regret the TKO600 with the .82 OD.
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