I'm sure that I'm overlooking something simple, however I noticed that I wasn't getting WOT, the butterflies in both the primaries and secondaries weren't all the way open once I put someone in the car to hold the pedal all the way down. I adjusted the throttle cable back and WOT looked in the carb, but now the idle is waaaay high (1800 rpms)! And I can't get the idle back down. The idle screw must not be touching the arm. Is the throttle cable too short? Or is there another way to get the idle back down to normal?