OK, So it does appear according to the instructions, I need the plate to be adjusted to spec WITH the fuel system pressurized. Will try that tomorrow and report back.7. Reinstall the rubber intake air boot, reconnect the coil wire, and run the engine until it reaches normal operating temperature. Then ground the coil wire and pressurize the fuel system as described in step 2.
8. Remove the rubber boot and check the height of the sensor plate. At rest, the front edge of the plate should be aligned with the narrowest point in the venturi as shown in Fig. 5-3. Adjust the height by bending the spring clip below the plate.
As far as my out of wack adjustment screw, I think I will center the plate right, and then richen the mixture until the injectors spray a little, and back it off a half turn. According to what I read online, that is as good as you can get to start the car and then fine tune it. It does seem that the mixture screw doesn't actually adjust the plate height, but more of "how soon/much the movement of the plate moves the plunger" but not the actual plate height.