Sell the GN, pool the money, buy an affordable 3rd or 4th gen, turbo it.
if you like street racing, the TR isn't the sleeper it once was. I'm not saying you can't have a TR that is fast but looks slow, but everyone is expecting them to be fast. Its like going to a shady pool hall and some dude invites you to play a game for money. In the back of your mind, you're thinking "I'm about to get hustled".
Check out the turbo'd 3rd gen Firebird in this months GMHightech, very cheap, very fast, very stock looking. I've been contemplating a build like that for a couple years now, just have other priorities right now. Plus I dropped like $30K in my Z28 last year. I have been on the lookout for a clean 3rd gen, very hard to come by. All the clean ones are fetching big $$$ (relatively speaking).
I'll get flamed for saying that, but I've owned TR's, blown V8's, turbo'd V8's, and of course N/A V8's. My current car makes a ton of power but is alot to try to put down on the street. Before I put the big blown motor in it it had a Heads and Cam stock motor, ran mid/low 11's all day. Ultra reliable, super easy. My grandma could run 11's in it. I had a minimal cash outlay and a very nice clean car. On stock rims it looked, well, stock. It went high 10's on a small shot. I could have passed it off for a stock car with exhaust. Of course, now it looks and sounds faster than it is.