I went to 3.37's for a good while and a year or so ago I had them replaced with 3.31. I enjoy the 3.31's more. It was kind of like cruising around in a tractor with the 3.73 and it's not significantly slower with the 3.31. I was around stock power levels when I went to the 3.73's. If I couldn't out run them with the 2.73's I still wasn't able to with the 3.73's, it just redlined quicker. It'd have to shift to 3rd to get to 60 mph and 110 or so is all it would do in 4th.
I used the 3:31 ratio in my '89s that I've had as a matter of fact I have a set in my garage that I didn't get to install in my last '89 GT. I also have 3 1/2" straight stainless tips that I never installed on the '89 LX. I should probably list them for sale lol
2014 GT Premium, Track Pack, Barton shifter, Borla S-type exhaust, Resonator delete, 3.73 gears, Airaid C.A.I., 93 Race Tune, JLT Oil Separator