Help I Need Traction

[Mustang_GT_90]

Yeah I was actually considering a set of BFG's, 275/50R15, the only problem is I mena he's turning it on street tires so I'd like to catch and beat him on street tires. I dropped the sway bar today, I don't know if it's actually gonna help any but I guess the weight being gone from it can't hurt. I guess I'll find out Tuesday night weather permitting.
Yeah I agree the Cooper Cobras SUCK. The only thing I can't figure out is a buddy of mine turned 13.60s on them with a basically stock GT, it was lightened, had a gear, and a set of pulleys and some other stuff. The battery is in the trunk, the smog pump and stuff gone and the 4 cylinder springs all the way around.
The thing is about this car, I know this is going to sound unbelivable but I"ve been in the car when he's done it. With half a tank of gas in it, it he can tach it up to 3000 and dump it and it just barely spins, like maybe 3 foot, and he's gone. I'm trying to figure out what he's got on it but I've looked under the car, no LCA's or anything I'm thinking either it's a freak or it's all in those 4 banger springs. I know that they'll help on the front but it looks like they'd hurt the back.