A second set of wheels with race tires is sure nice to have if you do much track work at all. I lucked out and bought a second set of wheels for $400 here on CC.
Here's my up coming weekend schedule:
I've mounted the race tires and will trailer the car to the track Friday for "fun run's" with some other Cobra dudes. Friday night we'll be at the local drag strip. Saturday morning or late Friday night, change back to the street tires for the long "cruise" with the group on Saturday. Back to the track on Sunday (competition day), mount the race tires again.
I'm gonna be worn out changing wheels before this is over...