Lets see:
So far I have swapped in the 455
Changed to an Offy 360 intake with 850cfm speed demon
W/Z exhaust manifolds
3" true dual exhaust with Dynomax welded race Ultra-flo mufflers
Art Carr TH-2004R with 2200 stall
Rebuilt 7.5" rear
Richmond 3.73 gears
Auburn limited slip
Put on 17x8" wheels all around with 245/45ZR17 Yokohama A520's up front and 255/45ZR17 Yokohama A520's out back
Installed the Hotchkis boxed upper and lower rear control arms
Made my own front and rear frame braces.
Installed GNX fender louvres
Installed the Pontiac Fiero GT rear spoiler
35% window tint and of course the
www.realoldspower.com window sticker
Jeg's High-torque mini starter
Ford remote starter solenoid
Upgraded battery cables to 1ga cables.
Installed F-body LT1 electric cooling fans
Mallory unilite distributor with HI-6 CD ignition and LX-92 race coil
Trans-am front seat, 3 gauge a pillar pod with A/F gauge, water temp and oil pressure
Replaced the stock gauge cluster with my own custom setup with VDO 3-1/8" 120mph speedometer, VDO 3-1/8" 7000rpm tach, VDO fuel level gauge and VDO boost/vacuum gauge.
Future modifications:
Replace the Offy intake and 850 demon with an Edelbrock performer and 800cfm Q-jet
Further down the road will most likely be a set of Rocket Racing heads and intake fitted for multi-port EFI and 1000cfm throttle body
The block will probably be worked over and fitted with a 425 crank, rods and pistons. Or I may go with a custom stroker crank and go for more cubes.
The cam will probably be a Bullet cam in the 220 or 230 duration @ .050"
The trans will be swapped out for a Viper T56 and GM conversion kit.
The rear will more than likely be a swapped out for a Ford 9" with 4.56-4.88 gears
Right now the car is being stripped of its interior to fix some rust and get ready for a mini-tub. I'm going to have the wheel wells widened a bit and then when the car goes in for paint, the body will be pulled off the frame and we are going to notch the frame in the back for wider tires. I'd like to get a set of 17 or 18x10's in the back with 315 series rubber.
There are a few other body modifications that are going to take place which are top secret right now.

LOL
Oh, and I can't forget the new 1-3/4" headers I just bought.

I was looking at making my own and had just started on them when a friend of mine finished a set that will fit inside the frame with a BBO in a G-body. Can't wait to swap out the manifolds for these.
Well, I think thats about it.
Take it easy.