carb ported and manifold vacuum question

I wouldn't think this distributor was any more than 2 years old. Maybe I got an old one. I saw that plate kit, but wasn't sure if I can get the rest of the distributor apart to use it. But, then again, I got down to the advance plate in the first place, so maybe I can. That kit is certainly cheaper than a new distributor is, too. I'll have to think about it. Thanks!!