NTPA Technical Services has made revisions to drawbar specifications for OEM Chassis Tractor divisions weighing between 7,700 and 10,000 lbs. (inclusive). This amendment applies to all Classic Super Stocks, Super Farms, Light Pro Stocks, 4.1 Pro Stocks, Hot Farms, Pro Farms, and Hot Rod V-8s as well as OEM-chassis Heavy Super Stocks, Pro Stocks, and 5.0 Pro Stocks.
In addition, multi-engine Modifieds powered by turbines will be affected by new cross-gearbox rules.
These two rule revisions may be downloaded from the links below.