i'm pretty sure it wont fit because the 94/95 rear bumper is different than the 96/97 rear bumper. Xenon makes there body kits for specific applications and they're arent interchangeble because the body lines wont match up. Easiest way i can think of to make it fit would be to put a 94/95 rear bumper on your 96 then it will fit right on there. Only problem with that is the rear bumper wont match the cladding on the rest of the car. hope this helps.
edit: by the way do you have a pic of your car, i'd like to see it with the 18" momo wheels.
2007 Dodge Ram 1500
2008 Suzuki GSX-R1000
2003 Suzuki GSX-R750
2003 Mustang Cobra 10th Anniversary - 11.2 @ 130
1997 Thunderbird LX 4.6 - 13.7 @ 103
1993 Thunderbird LX 3.8 - Slow
1990 Thunderbird 3.8 - Slower