Cold start problems

Check the filter for "plugged" or better yet remove the element for a couple of days and see if that improves things. Definately check the pulloff specification and whether it's operating. They can "pop" the diaphragm anytime, especially as old as these cars are

If these two things don't help, the choke thermostat may be out of spec, the linkage bent, or binding, or if you have an electric choke heater, it may not be working.