Jan. 3, 2023

The NHRA Technical Department recently made changes to the blueprint specifications.

                    Chev 1955 265 162 added intake casting numbers

                    Chev 1956 265 162-225 added intake casting numbers

                    Chev 1957 265 162 added intake casting numbers

                    Chev 1957 283 185-283 added intake casting numbers

                    Chev 14-15 427 450 added alternate throttle body

                    Chry 09-10 426 450 added alternate throttle body

                    Chry 2015 392 439 added alternate throttle body

                    Chry 2015 426 460 added alternate throttle body