It depends what you want to do...
If you want to put A/C back (in a LONG time, like, years) I would recommend removing the A/C Compressor, hoses, condensor and accumulator. If you dont want (take your dash apart), you dont have to remove the evaporator, just remove the hoses and seal up the hose ends with electrical tape to keep crap out and off the threads. Taking out the condensor with make lots of room for other coolers.
Also when storing the compressor, if it is still good, put some good light out in it before storing.
If you just want to remove it to play or winter (A/C works with defrost to prevent window fog in winter), go ahead and remove the easily accessible stuff (Compressor, hoses, maybe condensor) to put back in when you want (aka BLAZIN hot weather), but that would take a couple of hours and recharging equipment.
Yes, your heater will work fine w/o the a/c.
As for the pulleys, no. Doesn't your Bronc have a belt routing diagram w and w/o A/C?
All you need is a shorter belt.