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NHRA Tech Department makes corrections/updates to the Stock Car Classification Guide

Feb. 16, 2026

 

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

 

 







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