I know gears don't actually add any horsepower but if I switch my 3.31 ratio for 3.73 how much will the gains feel like?

 

You will get about a 12% increase in rear wheel torque.

 

3.73s will make the car feel like it should have come that way stock. The increase in acceleration is very noticable. 1st will be low enough to minimize clutch usage. 5th will be useable down to 40mph and will climb a respectable grade at 45. Up anything on the road at 50. 80mph at about 2500 rpm. You will loose about 1.5 mpg on the highway.

 

Ok thanks for the info!! Very helpful!