[Marshall V. Daut]

Put the wheel and tire back on with lug nuts so that you have more leverage to wiggle the brake drum/hub free. With the outer nut removed, spin the wheel as fast as you can and have someone hit the brake pedal. That might jar the drum loose.
If you backed off the adjusting wedge and the front drum still won't come off, try prying the large retainer washer and outer bearing out of the hub. The bearing may be galled to the spindle for some reason. It doesn't "thread" on, like a Model T. It should just slide off once the outer keyed washer is removed. If you get the washer and outer bearing out and the drum STILL won't come off, that can only mean that one (or both) brake shoe is still too tight or somehow hanging up against the drum.
Marshall