Thanks for your replies.

I meant ZDZ 80. Its a problem because the rear carb prevents you from taping the back plate. Also there is no vacuum line to the carb to tap.
I had a similar problem with the G45 and wound up sending the engine to B&B to install the tap. They put it in the side of the cylinder wall.
I know people have used the B&B system with the ZDZ80. I just wonder where they put that huge tap. Its 1/4 in in dia. (od) I asked B&B if I had to use that huge tap and the answer if I wanted reliable smoke I needed to.