I just came across a good deal on a set of bogarts and 30' hoosiers. I have a few questions

1. I'm worried about grinding down the rear calipers. My trk is driven approx 4 or less days per week and is raced prob 5-10 times per year. Is grinding down the calipers too much for my driving?

2. A kenne bell is def in my future again (after i regain money i got screwed out of from the last KB i bought). is 30' slicks too much for me right now? (i am running 3.73's)

3. I am currently running hoosier QTP 28/14.5/16 on a 16x10 rim. My best 60' with this tire is 1.70. is this too wide of a tire for me?

I'm sure i'll have more questions but i can't think of any more right now

Thanks

Will