[04BlackSilverado]

Originally Posted by Mike Carr

Here are some people to contact, to see if an '04 Silverado is eligible for Stock. If not, most all IHRA Divisional Pro-Am races offer Box and No-Box ET bracket classes.

http://www.ihra.com/competition/index.php#contact

I know bracket racing, but what is "box" and "no-Box"?

Thanks for your time, Mike

I'll send them an e-mail