.82 or .64 TKO?

[Flash68]

Hey guys. I have to send back my TKO 600 to get the shifter location changed, so I have the opportunity to switch to the road race version with the .82 overdrive/5th gear. Wondering if I should do it. Here is my setup and welcome comments and suggestions.

68 Camaro
Currie 9" rear with 3.70 gears
TKO 600
Procharged 406 small block = 650-700rwhp
Air Bar 4 link
275 front/335 rear tires

Intended use: 95% street driving, maybe some road course or 1/4 mile for fun occasionally

Thoughts?