Quick n00b question
 

What's the difference between the 4 chassis?

Thanks for putting up with my n00bedness

Well 3 of the 4 all use the same length Driveshaft, while the RSX uses a shorter driveshaft. There is an even shorter driveshaft available, but no cars use it yet. Give CJ's FAQ a look, it lists everything.

Just check it out: CJ's Xmods FAQ