Re: Gear Ratios?
For a street car without OD, 3.73's would be the most gear I would want to run, but if you do a lot of highway driving, even 3.73's are a bit much.
You'll feel a performance improvement with anything steeper than the 2.73's you've got.
How much in town driving versus how much highway driving you do should weigh into your decision... 3.31's (or 3.36's if a ten bolt) will run about 400 rpm lower on the highway than 3.73's.
Which rear end do you have? You may have to buy a new carrier, too.
flat top 406, AFR 195's, XR286R, RPM AirGap
750 Holley DP,TH400 w/brake, 4000 stall FTI
3.31 gear, 12 bolt
... for now.