I was going to reply to "Sharx", but Don beat me to it, and he is right on. See, Don and I *CAN* agree on something
My post on another topic 4/06/10:
Scales. Fuel check. Heads-up runs. Qualifying. Teardowns. Class Wins. The possibility of being a DNQ. National Records.
I have had runs disallowed due to fuel and weight issues. I've DNQ'd at Indy before (2000). I've torn down for setting National Records. All while racing Stock Eliminator. Never done any of the above while bracket racing. Indexes too. In bracket racing, no one tells you you can't dial slower than (insert ET here--except for class ET breaks). Otherwise, in Stock, I could have run my daily driven 13-14 second '95 Camaro in D/SA and been OK, as long as it met the safety requirements. And in brackets, you don't have people telling you what blocks, heads, transmissions, spec numbers, etc are, and what you have to run, and you can't be DQ'd in Super Pro because of a cylinder head issue.
About the only similarity between Stock and brackets is a two dollar bottle of shoe polish.