Back in the "good old days" they used to run quite a few run what you brung races round flemington speedway and such. It was always the most fun we had racing "our" small block modified. There were weight limits and safety tech, thats it. Youd have all kinds of cars racing against each other and it was a blast. It also by it's nature tended to be a low brow event cause most guys wouldnt want to bring they're fancy Grant King Big blocks out and take a chance of being tangled with a street stock or something. Why the heck wouldnt something like that work with sprintcars and such. The other thing that can keep costs a little lower are claimer rules. Most guys hate the thought of their engine being out of their car at the end of the night, why build a $30,000.00 engine when places 2-5 could claim your engine for $10,000 or whatever. I'd never heard of this anywhere but you could also have a claimer rule on shocks, which are a ridiculous expence. Before the mid seventy's which were the "good old days" a low buck team could and usually would if they had a better driver beat the big buck teams. You built your own chassis, engines ect. and a real smart, good driver could beat a guy with all the money in the world. And thats a fact, cause I was there.