Get the insulating gasket from edelbrock It works. Make sure your choke is fully open when it comes off fast idle. Adjust your idle setting. It doesn't sound from your description that it's a boil problem. Fuel in the bowl won't boil in the short time from start up to coming off fast idle. Usually fuel boiling becomes a problem after the motor has been running at operating temp for a period of time. 10 minuites isn't long enough to get the intake that hot that it will boil the fuel. Make sure your not running to lean. That will cause excessive heat.