It wouldn't be as bad as the full targa, but it would still need extra support, I'm not sure if it would need a full molly roll cage to add the roof support that was taken away. most cars that you see with targas and t tops have full frames, like the trans am, and the camaro, I don't know if the Supra and the 300zx are unibody or frame. Most of the time real drastic mods like the tops or something like molding new taillights are for strictly show cars. I don't like show only cars, knowing that it's not really drivable just takes something away from it.