I was wonder if anyone had any idea how far I would be able to lift my TB before I would have to start changing things like the drive train, etc. Is there any good products that you would suggest.

bumping this because I'm interested too

Some company makes basicly spring cups for the front springs to give an inch or two, I havent found any real lift kits for the TB. It would be good if chevy developed an Off Road package for the TB like it has on some of the pick-up lines..

Follow this link
http://www.automotiveforums.com/vbulletin/showthread.php?t=418760&highlight=lift+kits

you can find spacers but still not more than 1.5"