i just noticed this thread i should be able to help you, 3.90 would not be to much gear for you, ive been running 3.90 in my car for about 5000 moiles and i love them except they would be much better at your pwr level than mine. you can still go 120 in 4th gear and i can cruise at 75 at 2800rpms and get 23mpg. so saying there not streetable would be wrong i drive 300miles a week with them. you will barely even notice the diff if you go to a 3.73. by the way trymy, check your pms

o n if you see me out i would be more than happy to take you for a ride so you can see the diff and shiftpoints of the 3.90>3.55