Rx7 is the car I'm messing with. Weighed 2700 with rotary, I've added a lot of lightweight items and removed some metal. Still a street car with full interior. I've actually decided to switch paths and go to a k24. Just bought an s2000 trans, still on the hunt for a good k24a2.
For now I'm most likely going to go cheap, modified f20c header and intake manifold.
I'm money permits I'll go with the skunk2 ultra series intake and a ballade header.
Next year I'll either go 2.6 stroker and high compression, aim for 350whp...or spend a lot less and go turbo. Either way, I don't need more than 400whp for my goals. All motor might be more expensive for less power, but I would at least have a fresh motor vs a stock motor with a turbo. I guess I need to start hanging out on here more now. Maybe ill get a build thread going once my first piece of the Honda power plant shows up.