Building a Dirt Track Car
I spent some time with a few guys that run a 4 cyl class. Owner of the body shop and a couple of his friends. Pinto's and such, and when they started talking about track time to try out 20 sets of new tires to find the fastest set/ now they qualify as used for race day. Well you get the idea of the $$$$ that it would take to be competitive. There are guys out that that put serious money in "claimer" engines. The guys I hung out with also had a horde of body parts. It seemed every weekend they needed something, occasionally going on a frame machine.
Buddy up with a local and spend some time in the pits. Sounds like those guys are already running some serious gear.