Your car isn't running 13's man, you have no way of knowing that when you have already said in this thread that you haven't taken it to the track. I would say very very low 14's, and before it is said, i'm not hating or whatever. I like the way the car sounds, and seems to run strong for what it is. Props for being different, but you got a long way to go for 12's man. i have had many drag/street cars/trucks that i have raced. the track and low et's are a lot harder than just bolt ons. You will need better suspension better tires, a ****** to hold more power/weight, probably a stall would be really beneficial, and some 4:10 to 4"30 gears in the rear of that car would make a large difference b/c they would ge that weight moving.
Once again Props btw.
Jason