Oof, Mustang as a daily driver. While that would be nice it doesn't leave a lot of time for monkeying around with collecting parts. I'll make you a deal. I will send you (free of charge) an autolite off of my '67 200 SCV/LOM. You pay shipping costs both ways, USPS prepaid boxes are only $10 (ish). You can try it as long as you like (within reason) and then send it back after you have your carb situation sorted out.
The only real stinker in this situation is that I have never run this motor, I was told that it was out of a running '67 Mustang convertible, since it is on my floor and not in a car, the best I could do is hook up a battery and some transmission cooler lines and test fire it, however that would not tell you how well it runs on the road, so it would have to be 'unproven' parts.
The '67 and older distributors and carburators have to be used together as a matched set, the carburator with a Spark Control Valve (SCV) and the distributor is known as the Load O Matic (LOM). When you keep the LOM you are required to keep a carburator that has the SCV. If you upgrade the distributor do a dual advance (mechanical and vacuum) you open up your carburator options to any carb that you want to use, you can even continue to use your SCV carb if you like, just put a brass plug in the SCV holes and plumb the distributor vacuum directly into the intake manifold (log).
Right now I have a 240 (autolite 1100 SCV/LOM) and a 200 (1100/SCV) sitting on my shop floor, but aside from the very brief period that I helped my buddy with his '66 200/SCV/LOM before we upgraded him to a Duraspark II (wrecking yard, $25) I have no real driving experience or troubleshooting experience with the LOM. It may very well be a good spark control system, but since every manufacturer moved to a dual advance system, I *assume* that the newer distributors are better and since I have more experience troubleshooting them, I am going to stick with the newer dual advance (points or duraspark)
One advantage for you is that if you can find a points style distributor out of a '68 or newer your petronix I think will drop right in.