first off i really need gears, these 323s are killin me, so the locker with 410s is what im going with before the tranny.. how long if i only race it like 1 or 2 times a week. will my tranny last. also i called flt and no answer, a couple times.. i wanted to know how rough the stg 5 is. anyone know?

my last question is... when i get my truck on a dyno, do i need any upgrades with the drive shaft and if so can someone point me in the right direction.. thanks guys.