"Checking" the timing belt or even resetting it only takes 15 minutes. Replacing it is a different story. You do have to remove the ac, alternator, and bracket. None of the bolts should be going into a coolant passage though. Are you sure you didn't remove one of the water pump bolts by mistake? The AC bracket should just have 5 bolts holding it to the block and head. I can do a belt on my (admittedly later-model) '90 in about 2 hours, and that's stopping to clean parts as I go.