For the most part when you start a motor up for the first time and go for breaking it in,,you will get smoke coming from various parts of the motor,,,dont forget,,many parts have not seen running heat yet,,,i would say if your nervouse about it,,then pull one valve cover off and start it up,,see if your getting proper oiling to your top end,,,other than that,,,a good oil guage will help you see whats going on,,now and in the future.
Break in as per instruction's,,,and don't worry so much for now.