Hind sight being 20-20 I wish I had Kieth supply dyno #s below 4500 rpm just to see what the bottom end looked like. I opted for the .82 OD since there were a lot of people complaining about how sluggish the .64 made the acceleration.
Since I'm running the fuel injection, it's probably less of an issue than if I was running a carb.
Ideally the .64 would be a great 6th gear...
BTW don't forget about changing your input shaft if your going with an FE..