NASA PT class.
It's been hashed about over and over on these boards, but in simple terms, I felt that my car had a better chance to be competitive in PT within my budget than it would with IT. It offered me the flexibility to remain within the rules and enhance my car based on it's weaknesses. I believe that it makes for a more even playing field where many different cars can compete and have a chance to win, "warts and all" isn't in the NASA PT vocabulary. I also like the power to weight caps that limit the bank roll necessary to make the power. I'm sorry, I don't have 5K to build an IT engine just to keep up....
I was with NASA in SE-R Cup until 2007. I raced my first season in RS class with SCCA CalClub. I then moved my 98 SE-R to ITA. It really was not that hard to comply with the rules. Here is what I removed:
CF hood
Gutted and de-winged rear trunk lid
Lexan windshield
Lightweight battery
Cams
Added a glove box (comes in very handy btw)
AD22VF brakes from the NX2000 (I miss those the most. I wonder if there is a way to allows the NX2000 brakes on the 91-98 SE-R for an add weight)
The engines/trannies that I get are from the junkyard. I never built a 5000 engine nor would I ever do that. This is Club Racing and it is supposed to be cheap. My var is very competitive as is and I am thankfull to Greg Amy for bringing it into ITA from its also ran ITS status.