I have a 2006 as my track car. Gutted and caged, with full suspension. The chassis is really good, same from 05-14. Motor sounds great just not overly fast. The coyote cars made these largely irrelevant, but they have a great spec iron class for 3v cars. You also just get to worry about mods and maintenance vs chassis stiffening and rust.
I have aftermarket springs, konis, a full black interior that Id sell cheap also.