The throttle screw is covered and/or non existent on these... so, I just cut a vacuum plug down and put it on the little nub and got 6-7% throttle. I used another vacuum plug to block off the IAC tunnel in the throttle body since I was unsure if it was open or closed. Yours could be open, so I'd plug it, just don't let the plug go in the intake.

You can run without one, but you'll probably idle poorly when the motor warms up.