Autozone distrubutor vacuum advance locked?

There are different vacuum advance amplifier numbers as well . Look on the advance's body ; if you see , say "13" , that means , iirc , 13 degrees at the dist , and 26 degrees at the crank (or vice-versa ... too early for me to think right now :happy2: . )

And a heads-up : practically every major chain auto parts store carries A-One Cardone reman parts ; only the part numbers themselves are different .
I know this as I work for a " National Auto Parts Association ", and we carry Cardone , with "our" p.n.'s on them .

Anyway ...
Just grab new vacuum amp if you so desire ; and , get the Direct Connection distributor springs as they're lighter weight (you could hang a tank off of a cliff with the stock , emissions friendly advance springs !).