I would grab it, but then, it's because I could use a parts car for my 83 T/A. I build tranny's also so that would not be a problem. It depends on how much you're willing to put into it. The tranny could set you back $1000-$1500.
I would pick it up if the interior wasn't trashed and the body wasn't rusted out. Otherwise you'll end up spending a lot of money just to get it on the road. However, if it needs some work but isnt trashed its worth some money right there. These cars are going up in value especially since they discontinued the firebird pretty much indefinitely.