Coming from experience I can tell you don't do harnesses without a rollbar. If you want a rollbar you can get one from Autopower which is a company that makes pre-fabbed ones and they bolt in or weld in. I got mine from ioport.com for like $250.

As for padding my bar doesn't need it, my seats don't recline and when strapped in there isn't even any way I could touch the bar, so padding would be useless. If you notice the bolsters of the seats aren't too far from touching...



If you want to install one yourself you can read how I did mine at...

http://www.fourthgenhatch.com/rollbar.html