Carb Tuning

Hook up a vacuum guage toa manifold vacuum source, (on the carb or on a vacuum tee somewhere), and adjust the two idle mix screws for the highest vacuum reading you can get, one at a time. Start by screwing one in until the vacuum drops off then back it out until it doest gain any vacuum, do the same on the other screw and then repeat the process. I find a little reving of the motor occassionally during the process will help clear the intake and give you a more accurate tune. Should be good to go afterwards.

You can get a phenolic spacer for the carb. Transdapt makes a 3/8 inch thick one that comes with longer studs, nuts and washers. Obviously a metal spacer wont help the heat transfer so a phenolic (plastic or composite) material is the way to go.