That's pretty much how mine acts. Whenever I have the dizzy out for some reason, I stick it back in about where I think it was, and crank on it for a few seconds. If it kicks back, I know to retard it about a half inch and it will usually fire and run so I can get a light on it and do it right. If it spins over easy and doesn't fire, I know to advance it about a half inch and it will fire up for me. Its pretty flexible about timing, I think about 10 degrees either way, which is quite a big window.
You know, that's kind of why I like these old mopars, they aren't real particular, don't complain much, and go along way on a few bucks. My dad taught me that 55 years ago. Its still true.