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!
They are becoming a issue for me also, NOS mopar are to much to have on the shelf, seem the straight arm is 440 points, but it is also on some 383? Confusing as hell to figure out in a listing.
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