If you're going to running alky at the track don't worry about running two different setups. I run about 24 psi and 23* of timing with 93 and alky on the street. At the track I run 24psi and 23* of timing on 93 and alky. Thats the good thing about alky if you have a street driven car. Like ron popeel (sp?) set it and forget it.
Its nice having 400+ hp and 550+ ft/lb of torque to the rear wheels at all times.