[kitcarbp]

You will be happier with the 0.82 for driving on the highways below 80 mph for the reasons stated above, its about matching the ratio(s) to the cam/intake rpm band your engine is optimized for. With that said, have you considered the T56 6 speed which is a game changer a bit and offers you more versatility. search threads here on CC for T56. Its been done in a Superformance and since you are still building, cost wise should be similar. In my build I decided on the 0.82 using a 3.25 rear gearing but I'm not on the road yet to give you feedback.