gearing?

[HiFlow5 0]

ok i have a 89 GT and i want to put new rear end gears in it. i have a Auto with a shift kit and have heard many say 3.73's are the best for an auto. i do as much highway driving as i do street driving, so i don't want to over rev the engine at fast speeds, would 3.55's be better? i do want a quicker launch cause these 2.73's arn't cutting it when i street race! other cars usually get a jump on me off the line. my car just doesn't feel powerfull when i start. if i leave my car in 1st and shift it myself i feel way more power once i hit above 3500 rpm's, would a stall converter be to my advantage? any input would be great!!!

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89 GT, Trickflow intake, Crane (E-type) cam, 70Tb, 75MAF, 1.6 Rockers, Pulleys, MAC headers and H-pipe Dynomax mufflers, K&N, 3 core radiator, custom interior, cobra R rims