i have a quick question.i have a 97 mustang gt with 3.73s, homemade cai, msd wires, new plugs, i cleaned the maf, and has 102k miles.well my cousin just bought a 2000 mustang gt vert.its all stock with 90k, i just cleaned the maf and installed a k&n filter and took out the silencer.the thing is my car can burn the tires pretty good while his feels a lot less torquier.my car feels stronger all the way through!!!i take out the traction control and it barely even chirps em, while i got bigger tires(275 40 17s)and i can get my car sideways.theyre both automatics what can be wrong with it??were gonna change the plugs and do an oil change and see if that helps?? also u guys with 4.10s at 75 mph at what rpm are u guys at??i keep telling him to go 4.10s but he thinks it will be too much gear.any suggestions, ideas,or tips on how to make it perform are welcome and thanks