Dec. 7, 2022

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

                         Chev 396 325-350 added alternate manifold 68-69

                         Chev 427 385 added alternate manifold 1968

                         Chev 427 335 added alternate manifold 1969

                         Chev 350 580-590 corrected manifold casting 2018

                         Chev added COPO Camaro combinations 2023

Chev all LS combinations added alternate cylinder head 12-18

Chev 350 external oil pump permitted in Super Stock only 19-22

                         Chev 350 added alternate intercooler 19-22

                         GM added alternate throttle bodies 05-10

                         Chev added alternate throttle body 14-15

                         Chry added alternate throttle body 09-10

                         Chry added alternate throttle body 2015