Yep. Lots of bad habbits to be unlearned.

I've already decided that once the kit is built, it gets a minimum of 1 full season on street tires.

Jeremy, What you'll find with the mustang is this... it doesn't turn well.
With not so sticky tires, the front end plows just a little bit and the front end slides out in a turn. Common sense says stickier tires will let you not slide so much.
So, you add sticky tires.
The front end grips more. It also plows more. The front springs compress and you get camber gain and end up riding on the outside edge of the tire. Now that you're running on 25% of the tread, the tire slips. The suspension decompresses. The tire lays flat on the pavement and grips again. You start the whole process over. It's completely unpreditcable and a bitch to drive. And you eat tires.

The only way to make it work is to put on insanely stiff springs. I was running 425lb/in coilovers which are roughly equal to 1600lb/in springs in the stock perches. That limits suspension travel during hard cornering and keeps you from eating the outside edge of the tire. It works great on smooth course, but on rough course, you chatter across the bumps.