hmm, i have run 13.49 @ 101 mph in my wifes 94z, it is an auto with 3.73 gears, only minor bolts ons and free mods, still stock manifolds and y pipe(for now). your mph is better, your 60' is good, what are you shifting at? have you had the car on a dyno to see where the motor makes it's power?
g'luck, i am sure you can et better than what you achieved to this point!

 

I have the hypertech thermostat.