1. You can't totally eliminate power steering, unless you can find someone to make a worm and pinion type setup for you. AC?:rolleyes
2. Considering the way he has gone through TH350's and such, I would imagine he'd go through clutches 10 times as often. Oh yea also about that, a lot of people have trouble placing the shifter with a manual or even auto for that matter. 350 w/ a B&M will do. It's not as fun, but it's more efficient.
4. Try somewhere like grannysspeedshop.com or midwestmotorsports.com. Places that do a lot of RX-7 swaps.
5. Fuel tank is in the way for dual exhaust. Maybe you could get a fuel cell.
7. The stock R200 will hold up, but no one is guaranteeing traction.
8. I wouldn't wanna mess with a fuel injection system if you don't have the skills. Go with a carb setup baby. So much easier, and you don't have the wiring headaches.
9. Shoot, Dual 12 in. fans and a bigass radiator from a truck should solve the issues.
10. I'm sure you can quote Aries by saying, "Handling? What's that?"
11.I'm sure Aries spent multiple thoouusand's of dollars, but there are simple setups you can do for 1000-2000 bucks.

As long as you have a TIG and you're an expert. There are 3 people in my town who have done V8 swaps into their RX-7's. All of done it for under 2 grand. (Excluding the amount put into the engine itself.)They might not be the safest cars or most legal to drive, but they're fast as hell. oh yea...nasa?