Im new to the forum, its a great source of information. I just had the tranny guy at my dealership rebuild my 700r4 with a street/strip kit from pro built. This kit comes with a trans go shift kit. I got the tranny in the car, filled it with fluid, let cam break in, pull it into reverse, reverse works fine, pull it into drive, 3,2,1 , I have nothing. feels like neutral. I watched the guy air check everything when the trans was rebuilt, he was very thorough and followed all of the notes in the shift kit. What possibly could have happened. I would really appreciate your suggestions.

Pull the pan and check to see if the boost valve is laying in the pan. If the snap ring was not seated properly, it would explain your problem.