NHRA Tech Department makes corrections/updates to the Stock Car Classification Guide
- Feb 16
- 1 min read
The NHRA Technical Department recently made changes to the Class Guide.
Mopar 64-91 273-360 added replacement cylinder head
Mopar 66-67 273 180/177 change to 273 180/166
Mopar 66-67 273 180 corrected engine family number
