The thing about dwell.
First, most Mopar single point dist's are well, junk. Sorry.
This IS a 'little wide' if the dist. is tight. First thing to do is make sure there's a tiny amount of lube on the "approach" side of the rubbing block. Good quality point sets, like Blue Streak, used to come with a tiny capsule of lube
Next, while watching the meter, gently rev the engine up to high RPM and back, both with the vacuum advance connected, and also disconnected. See what the dwell changes and I'll bet it does.
Depending on this operational change, and how loose the dist. is, you'll have to average out the change and decide where to finally set the dwell
Always set the dwell a little on the wide side to allow for wear, always apply a little lube, always check and reset it after a thousand miles or so,
and ALWAYS set the timing AFTER you adjust the points Points wearing closed will retard timing
