really the debate is between 3.73's and 4.10's, NOT 3.73s, and NOT between 3.73's and 3.55's, UNLESS you do ALL highway drivetrain, or run a power adder.
other than that, I run 3.73's with a t5 with a 3.30 first gear, and have plenty of first gear. First gear pulls like nothing else. My buddy ran 4.10's and a 3.30 first gear, and had no issues either.
Anyone having traction issues has a few things to look at.
1. dial in your
suspension. Are you running rear lower and upper aftermarket
control arms??
2. how is your weight transfer? Make sure the rear end is VERY stiff, and that will go a long way, even if you don't soften up the front end.
given that, I've got a gt40p motor, and all those mods, and first gear still spins intself to redline. However, i've found that a lot of practice launches helps tremendously.
Not only that, just run a street drag radial full time. that's what I plan on doing. My buddy is putting down over 300 to the wheels, with 4.10 gears, and runs a drag radial on the street, and can't even chirp the tires!