Is this a real question...lol
a 4.0 v6 s197 mustang vs a sn95 ..
you should walk it like its standing still...
your car is 170-200rwhp stock, a 4.0 v6 car is a 160-180rwhp car stock. with your mods you should be in the 200-230rwhp untuned with a tune, around 220-250rwhp with your mods, do some gears and a tune and its all over for him. and even if the 4.0 v6 car has mods even full bolt ons in a v6 wont do shit he prob lucky to make 180-200rwhp with every bolt on and still have no where near power band / torque of your v8, and s197 cars are alot heavier then your sn95.
yes horsepower is close, but a 87-98 still has 5-15+more horesepower stock vs stock and 50-75 more Torque and prob good 100+ weight advantage. and your car isnt stock you have some mods, I would say stock vs stock the gt should win by a few cars, and bolt on v6 vs stock sn95 would be close, but v8 should still win with torque and better power band and low end and curbe weight and torque, and soon as you do any 1 mod esp gears on a sn95 its all over for the 4.0 v6 car, the 3.8 and 4.0 v6 cars are junk.only v6 worth a dam is the new 3.7 2011+ v6 cars, which those are still only in the high 13's to mid to low 14's stock. older v6's are 15-17 sec cars stock, and a sn95 gt is a 14-15 sec car stock. so if you dont beat the 4.0 I would drive your car off a cliff lol