[MylilBowTie]

First set your timing to where you want it. Then set you idle rpm, if you have an after-market ignition curve make sure it idles below where is starts the curve. I use the port on the back of the intake (modulator line) of the source of vacuum its a little lower but for me its steadier. Once all that is done now its ready to adjust the IMS. Counter Clockwise (richer) Clockwise (leaner). When the engine is warm turn one IMS all the way in and lightly seat it. Then start turning it in small amounts ccw. During that you also need to watch the tach to keep the idle rpm the same. When you have the highest vacuum then turn it cw 1/2 turn. Then do the other IMS the same way. If its an Edelbrock the air filter should be on when tuning it. With it off it will be leaner with the air flow it can get without the filter.

This is off the top of my head so it might need a little help.