As the result of runs under the Automatic Horsepower Factoring System (AHFS) 1.20-second under policy at the Lucas Oil NHRA Nationals, the following change has been made.

The horsepower rating for 1986 Chevrolet truck, entries with the 350 cubic inch engine and a factory rating of 1655 currently rated at 165, has been increased by six horsepower, to 171 horsepower; for Stock Eliminator only.

NHRA's 2012 Automatic Horsepower Factoring System outlines that any run of 1.20-seconds or more under the index will receive an immediate index decrease or horsepower increase. These changes are effective Aug. 21, 2012.