Sparks,
I use the Centerforce clutch in both of my cars and the 500 mile break in time is to let the clutch and everything get properly seated before you start dumping it hard. As for the car creeping that should be adjustable. You should have some kind of clutch travel adjustment near the transmission. I have one cable type and one that is rod adjustable. The reverse grind wound tend to indicate that you do need to adjust it just a little. As for the carb adjustment, I leave that for the guys who really know those carbs.
Ron
