Gotta go with Kent, Dan and Glen at this point.
Get yourself a rule book, keep it by your bedpost, read it every night, highlight it, put post-it notes for book marks in it, and start a spiral notebook check-off list as you go. And when the new rule book comes out, check it against the one you've been studying and note any changes.
G/PS looks like a class you could run in, provided you leave the body stock and move to racing gas. To run, your car will need to meet the requirements of that class. Off of the top of my head, aside from the cage, you'll need roof rails, 1 inch lug nuts and racing approved tires, and that's just because the record in the class is over 200 mph.
I am curious, though, as to how you calculated your 216 mph gearing. You'd be looking at peak power at about 8,500 RPM, assuming a 3.50 dif and .80 OD, and that's going to take a helluvalotta Mitsumotor. While the air is thin at Bonneville, it's still thick enough to provide resistance. I'm not trying to scare you, but it's going to take some $eriou$ engine work to make that happen.
Don't let details stop you if you're looking for fun and time slips - but do keep in mind that ignoring the rules will prevent you from having either.