1950 216 very much all original. 6 volt gmc. Canadian. The truck idles and runs fine once started. When cold starting the truck at room temperature it is hard to start. What it does: step on the floor starter it turns over nicely but will not fire until I pump the gas peddle repededly. Now it fires but will have fuel running down the outside of the carb. I can either leave it idle or nurse it up to a faster rpm until the excess fuel is used up. At that point it runs fine. Not flooding at this point. Now if I turn the ignition off . I can restart it with just a touch of the foot starter and no throttle needed. How do I get her to start with out flooding at first start up? Thanks