BJ if you remember it used to be like that, 10.49 and lower, 10.50 to 11.99, and 12.00 to 13.99, then slower. That was in the 80's. I ran my 65 Chevelle in bracket 2 it ran 11.50's and was track champion in 85/86. I liked it that way and for the most part never ran against a rail.
JMO
Zip.