Here is my '90 T-Bird SC.  This was my very first car and I have owned it for 13 years.  I love it and plan on keeping it forever.

Current modifications:
16 x 8 Centerline wheels (16's were considered big when I bought them in '96) with 245/50R-16 tires

Eibach lowering springs and Tokico shocks

Down tubes w/cats and cat-back exhaust (dual 2.5 inch) from Super Coupe Performance 

Aftermarket spoiler

Alpine stereo system

For those who don't know the engine is a supercharged and intercooled 3.8 liter OHV V6 with aluminum heads. Stock horsepower is listed at 210 (I estimate mine at 236 based on similar modded T-Birds, but that number hasn't been confirmed) and the stock 315 ft/lbs. of torque is impressive.  Mine has a rebuilt long block from Super Coupe Performance and is mostly stock with the exception of a K&N air filter and the exhaust system.

Restoration update:                                                                                                                                                   Sep. '08:  Major drivetrain restoration is now complete: new long block and engine mounts, new radiator, new clutch, resurfaced flywheel, new power steering rack & pinion and pump, new front suspension (ball joints, control arms, etc.), new shocks and upper shock mounts.  Also the air conditioning has been upgraded to the new standard.

Oct. '08:  New stereo system is in and includes an Alpine head unit and four Alpine 5x7" speakers (replacing the factory ones finally).  I may add a subwoofer eventually.

Future plans: 
Restore interior (front seats need new leather) and exterior (needs minor bodywork and of course new paint and bigger wheels).  I'll keep you posted.