Constant or Ported Vacuum Source for Distributors? ...AGAIN!

Yes, that is the one I need . Frustrated? Try beyond frustrated ! I went through this 2yrs ago with the factory distributor, found the can only to find out it was obsolete. Bought this reman one, can failed and as life would have it.... it's the same can that I Needed 2yrs ago ! I will not pay for an NOS unit, too much $$ just to have that fail as well because it's ancient!
I'll send you a PM so the thread doesn't go too far off track.