Dec. 13, 2021
The NHRA Technical Department recently made changes to the Class Guide, due to clerical errors as follows.
Chev added 346 305-320 combination 1998
Chev 1969 427 430 added replacement heads for GT
Chev added COPO Camaro combinations 2022
Mopar 64-91 added aftermarket heads for LA motors SS only
Pont added 346 305-320 combination 1998