Once you rebuild the carb and do an ignition tuneup, you will probably be able to further improve drive-ability by playing with the timing. With modern gasahol fuels, a lot of early 60's Fords need a bit more timing. Some lighter springs in the distributor that bring in the mechanical advance earlier can help, too. At a minimum play with base timing and try bumping it up to 8 or 10 degrees before top dead center and see how that goes. It probably uses manifold vacuum for advance so be sure to disconnect and plug it when setting the timing.