You can still get hubs from the dealer for the EF.

14x7's are fine. I wouldn't worry about the corner weight and tire capacity... it's a non issue. You don't want 15x7's b/c fitting 225/45 Hoosiers is a real PITA on the rear. It can be done but the offset is crucial and they still barely fit. The 14's are going to be just as fast but easier to get on the car.

4.7 FD is the best "all around" although different options may be better for specific tracks.

The weight adjustment was part of the Great Re-alignment. The CRX was one of the bogey's for the class and the weight really hasn't slowed them down.

Sphericals are good but especially important in the radius rods. You can run a mix of OEM and poly on the rest and be just fine.

IT allows a shit-ton of development and parts. You can spend some serious cubic-dollars when looking at a full prep car.

Christian