I guess i just dont understand all this non wing restricted motor stuff. You can buy a good used all aluminum 12 degree 410 for $8-12,000 and be more than competative on most smaller (less than 1/2 mile tracks). I like the idea of the 305's etc but for the same $ you can build a non wing 410 and increase car count signifigantly for existing classes and tracks instead of fragmenting the sport more with more classes.