A few seconds..
#2
3600+ stall/cooler.
If you aren't going very far with the car then do the gears. If you are save up for a stronger rear end with better gears instead.
Stall needs a tune in obd1.
#3
I just want to go faster than what i'm doing now. I have the full suspension being installed, and would like to have something that will rip most anything on the road. I don't plan to hit the track much, and don't want to spend 10's of thousands on the car, however I don't want to be eaten by g35's and 300C's..