If you are looking for inexpensive racing with good competition see my earlier post on heartland racing association. They have iron block spec motors but any one can race with them. They just have to run 15/8 restricters and MD62 right and 42 left rubber. Last year we allowed +50 and +40 on the durometer which worked fine but kept encountering gray areas to ***** about. Kids were getting started with 5,000 to 8,000 dollars worth of used stuff and bumming tires off the wing guys and learning to DRIVE a race car.