I also would not make the swap. If your gonna make a gear change, then make a GEAR CHANGE. I wouldn't even go from 3.23 to 3.73 but im not like most here. i dont care about MPG or RPM on the hwy, i enjoy the seat of the pants, neck snapping, pull the front end up from a stoplight kinda ride.... i will admit that driving around in a car with no AC and cabin temps well over 100 degrees, while doing 45 on the hwy and going def isnt super fun but at a stoplight, where my car is built to run. Its the most fun you can have in a "street legal" ride.