Thanks guys for your responses as it is helpful to see what others have done or would do. The reason I am asking is it seems to me it cannot hurt to do the initial bleeding of the new master cylinder into the system since everything is new and has no fluid in it anywhere. There is only air currently and what can a few more air bubbles do since they will get pushed out anyway? I know there is a small chance that some will be difficult to remove but the system is chuck full of air now so I am wondering if a little more air is really harmful. Obviously I will have to repeatedly pump the brake pedal and keep and eye on the fluid levels in the reservoir until all air is out of the system as I am purging each of the wheel slave cylinders. If others have input to make I would appreciate there expertise and experience. I am still a few days away of adding brake fluid to the system. Again, thanks to all who have shard their recommendations and experience! Mickeystan