http://www.nhra.com/competition/classification.aspx
Quote NHRA <span style="font-style: italic">"Al(uminum) component car required to have aluminum hood with hood scoops, & both aluminum front fenders to be classified as an aluminum component car."</span>
They show the flat steel hood or the aluminum hoods with scoops. Then you can add in the variations with the high compression engine with dual carbs or the low compression engine with dual carbs. Plus they have the Super Stock weight factors on the same page..... It gets just a little busy. Just take a look and see. [img]<<GRAEMLIN_URL>>/crazy.gif[/img]