Carb Help!!!

Ok so I set my timing at 15 BTDC and reinstalled the 600 Eddy after I reajusted the floats again. I did not hook up the electric choke and it fired right up and ran perfect. I shut it down and hooked up the choke and it did the same thing as before, just immediately die after a few seconds. I took the 3 screws out and rotated the housing forward towards the front of the car and it fired right up again. As soon as the choke opens the butterfly on the top of the carb the car dies immediately. Any ideas or suggestions?