Feb. 3, 2025

The NHRA Technical Department recently made changes to the Class Guide.

Chev 307 200/195 change to 307 200/165 1968 Full size, Chevelle, Chevy II Stock

Chev 307 200/195 change to 307 200/160 1969 Camaro, Chevelle, Chevy II Stock

Chev 307 200/195 change to 307 200/170 1970 Camaro, Chevelle, Chevy II Stock

Chev 307 200/195-168 change to 307 200/165 71-72 Camaro, Chevelle Stock

GM 325 303/303 change to 325 303/280 Impala, Monte Carlo, Grand Prix stock

Ford 289 210/204 change to 289 210/195 1964 Mustang SS

Ford 289 210/210 change to 289 210/195 1964 Mustang SS

Ford 289 210/223 change to 289 210/205 1964 Mustang SS

Ford 289 210/215 change to 289 210/205 1964 GT

Ford 289 210/209 change to 289 210/203 1964 GT FWD

 Ford 289 210/225 change to 289 210/215 1964 GT

Ford 289 210/220 change to 289 210/213 1964 GT