It's all about consistency with bracket racing. IMO, big inch NA motor shifting at lower ( but more consistent ) rpm's. Good solid back half with big tires. Stay in the 10's or 11's. Bigger /heavier cars are less effected by cross winds and often have more consistent ( but slower ) 60 ft times. Most consistent winners in bracket racing usually run about 1/2 second slower than their car is capable of running. Different mind set for real bracket racers. I could never quit go there - always wanted to go as fast as I could. Hence, always making changes. A breeding ground for inconsistency.