Which Gear?

Anywhere form 3.55s to 3.91s Should work. Just remember the
higher the gear. The more rpms on the highway.
I got 3.23s for the street and 4.30s for the strip.
But I have a 8 3/4 rear, so it's easy to exchange them.
With your rear you should find something in the middle.
Good luck. Green Duster.