With no emissions testing that you have to go through, you can in theory delete a lot of the vacuum lines, even more if you change to a different carb. You'll need one for the distributor vacuum advance, one for the brake booster, if you have the selectable 4WD you need one for that, one for AC if your car is equipped with that, PCV needs one. Others can provide their input on things like the CTO switch, the EGR valve, the little gizmo on the carb if you stay with the Carter....I'm sure I'm missing out on some of the others but that is a start.
Good luck!!