Take a look at any of the circle burner parts sites. Many of the dirt trackers, and all of the higher class modifieds and late models run a floater rear. Familiarize yourself with what you'll need, then watch for used stuff. The snouts the Grand National cars use are fairly cheap and plenty strong.... Only problem might be finding a drive flange with enough splines. Most of the circle burners on dirt only run a 10 or 12 spline axle, wouldn't last long in a digger with slicks I don't think... Broke two axles last summer, just dirt tracking and getting a good hook.... Check eBay, too. Not a real big selling item, if you could locate one, could go cheap....