What questions you have? The sites I mentioned should be a gold mine of info for you. Also, the TA will be a summer only car right? Cause if theres 1/4 inch of snow on the ground, theres only one way you are going to go, Sideways. Even with 200lbs of sand in the back my GTA wouldnt move too well, very dangerous in the snow. (but a lot of fun in parking lots, heh)
Sites for the 4rth gen are www.ls1.com
the LT1 model years are covered there also.
Any questions you have on the 3rd gens ask away...