Jan. 27, 2025

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

Buick 1979 updated cylinder head casting numbers

Chev 71-72 updated intake manifold casting numbers

Chev 75-76, 79 updated cylinder head casting numbers

Chev 19-24 updated piston dome height and volume

Chry 72-73, 78-80, 80T updated intake manifold casting numbers

Chry 72-73 updated cylinder head casting numbers

Olds 1979 updated intake manifold casting numbers

Olds 1979 updated cylinder head casting numbers

Pont 71-72 ,83 updated intake manifold casting numbers

Pont 71-72, 79 updated cylinder head casting numbers