So I've been in contact with FastEddie from The Eddies Custom APV Club..
We're trying to gauge interest from the community in his event, No Gas Nationals. It's always been a straight up gravity vehicle race, but is 100% down to switch it up if we get enough people involved. Regardless, you could ditch the sleeves and grip down the run as part of the main event. Please let us know if you are interested in attending. As it grows closer, we will need a confirmed headcount to warrant a separate class in the event. Any questions, please post here.
As of now, it's looking like Sept. 28, 2013 in Kansas City, MO. There will be an entry fee of $20. More details to follow as they get ironed out.