Sell the stang and put that mustang down for a 02 WS6. J/K lol
Personally i would take that money and beef up your rear end. I would get a 31 spline in there. A lot of the guys on this site just focus on there motor and forget about there rear end. If you don't want to do that then just drop the car. Your handing and 60 ft will inprove at the track.