Someone help me out

[AdamM]

My girlfriends father has a base 89 corvette. I really think that my mustang is faster and have been looking for quarter mile times for the vette, but have not been able to find anything. It's bone stock, and hardly gets driven. I guess what i am trying to find out is, could my 93 GT, with pulleys, air filter, off-road h-pipe, flowmasters, 3:73 gears, bumped timing, and shift kit beat a stock 89 corvette that doesn't get much attention. My girlfriend just doesn't want to believe that a corvette, no matter the year, is slower than a mustang and i really want to prove her wrong. Any info you could give me would be great, thanks.