Again thanks to all for your ideas. This carb has been checked and re-checked and it is flawless. My next attempt is to heat the intake. This engine will not run/idle off the choke until a minimum of 150 degrees F. I have a Clifford catalog that lists a p/n 08-1900 exhaust heat kit and a p/n 08-1856 thermo/water heated kit. An ace mech I served with in Coast Guard Aviation recommends the exhaust kit due to it's instant heating capabilities vs the H20 (still have to wait for the cooker to heat it up). It is his and a few others thoughts that the lack of heat in that large cavity is not atomizing the fuel properly for low rpm/idle burn and raw fuel is going through and out the tailpipe. This manifold has 2 each plugged ports in the side of it? The Clifford catalog does not say what those ports are for? The next problem is the Clifford web site does NOT show those kits as available. Anyone got one preferrably the heated exhaust kit under the workbench that they will part with?