There's plenty of good used "older" chassis around. It takes a lotl more than I thought to convert a midget over to a mini sprint. Check classifieds here, and MMSA facebook. Also check with Andy Bradley. (Bradleyracing86). He's on here and has some engines for sale in the classifieds. As long as the chassis is straight, older cars are just fine. Older Henchcrafts, Baileys or ERCs are all good.