It's a 98 Mustang GT dyno'd at 307 rwhp with 4.10 gears. About what time will he do in the 1/4 mile? Obviously nothing my car with touch but I'm interested in knowing.

 

My guess is low 13's.

 

Given an ideal suspension and great driver, it should actually be capable of dipping into the mid 12's @ 108 - 109 mph. Stock suspension and average driver, I think low 13's would be a good estimate.

 

I would have to aggree with the low 13's also if the driver is good maybe break into the 12's. I have a friend that has a 92 gt notchback with 360 to the engine and he is running 4.10's he could only manage a 14.2. He has a auto also. I have seen 98 GT's at the track with paxton superchargers running low 13's and that super charger adds close to 80-100 hp. Traction will be an issue with those gears. Should be low 13's if driven the right way