The 65 200ci six uses a dual vac advance distributor (the Load-o-matic) that will not operate correctly with a carb other than the autolite 1100. That is to say that cars built for states other than Calif came with this combo from the factory. The 1100 will work with the later distributors, i.e., the 1968 - 1973 dual advance type (vac and mechanical advance), and the DSII, but the 1965 dual vac distributor will not work with other carbs. So, if you are planning to upgrade your carb at a later date it would be a shame to buy an Ignitor II for the Load-o-matic and then, with a carb upgrade, have to change to a distributor that the Load-o-matic Ignitor will not fit. Since the the dual advance distributor, and the DSII, are considered superior to the Load-o-matic, it would be worthwhile to upgrade the distributor when you purchase the Ignitor II so you don't run the risk of having to purchase another Ignitor to fit an upgraded distributor later.
Is there a dual advance distributor that a Load-o-matic Ignitor will fit? Yes. But you will have to find a dual advance with the Load-o-matic type / style drive. This distributor is referred to as the "Thermactor" type and, to the best of my knowledge, was used only on '65 & "66 California cars. Acccordingly, they are probably hard to find.
Bottom line, you will be ahead of the game to purchase a rebuilt standard dual advance distributor (about $65) when you upgrade to the Ignitor as insurance against having to do it again later.
Good luck with your project
Steve