Starting a buisiness

I decided to try it part time after hours and keep my day job unless my current boss fires me. I doubt he will like the idea,and the shop is only 75 yards away from his. I plan on parting out a few cars and doing a little after hours preformance type work that probably wouldnt have gone to his shop anyway but sooner or later it will start pulling work away from him. I am checking on insurance and the phone Monday,and already talked to the local parts store about an account.