Shane, like Nick stated, you shouldn't have to bleed the brakes. I went from manual brakes to vacuum recently and all I did was make sure the MC was bled VERY thoroughly and made the brake line connections the very last thing to do. Basically, unhooked/unbolted everything on the old MC and when it was time to swap the new unit and booster in, I swapped them as quickly and carefully as possible. Is there a chance I got one or two small air bubbles in there? I guess....but perfect pedal for me. No bleeding required.
Robert Dean: Start your own thread so that you're not hijacking someone else's thread. But, based on your description, you probably need to bleed again. I suggest re-bench bleeding the MC. The step bore MCs can have a surprising amount of air still left in them, even when you're sure you've gotten it all out.