I think that the only way the "shootout" would be valid would be to have the manufacturers enter a "standard" setup vehicle. In other words, a drag race between a 500 horsepower 427 c.i. CSX car against a SPF with a 600+ horsepower 514 c.i. crate engine wouldn't be fair.
The rules of the shootout could be 500 - 550 horsepower engines (small block and Big Block) and a somewhat "standard" setup (15" wheels, etc..).
If there was a "Extreme Shootout", you could also bring the manufacturers Baddest a$$ setups.
Oh yeah, we could have a "street racer" category.....just kidding!