im going to get some gears put in on an 03 GT and i wanted to help beef up the rearend some. i had a 97 GT and busted the posi on it twice. kinda afraid to jump on the car with fear of breaking the rearend. its a daily driver with some weekend racing every blue moon or so. ive heard of some people launching at 6k rpm with drag radials on their stock rearends. so confused, HELP please!!