Assuming this is a nice street car, I would go with a super T-10. With your HP rating, you can pick any of the first gear ratios (2.88/2.64/2.43) and end up with a decient cruising rear end ratio. The first gear x rear end ratio is the one to focus on. Too low and you have a stump puller, too high and it bogs... Give us a little more info (tire dia, cam or cam RPM range) and lots of people will give great advice.
I always like people who row thru the gears!!!
Dave