New Old Stock
HEATER CORE 
Chrysler
1971 Imperial w/All
1972-73 Imperial All
1972-73 Imperial All
1971 New Yorker w/AC
1971 Newport w/AC
1971 300 w/AC
1972-73 New Yorker w/AC, w or w/o Upper Vent
1972-73 Newport w/AC, w or w/o Upper Vent
Dodge 
1971 Monaco, Polara w/AC 
1972-73 Monaco, Polara w/AC, with or w/o Upper Vent
Plymouth
1971 Fury w/AC
1972-73 Fury, Gran Fury w/AC, w or w/o Upper Vent
  
 Core Size: 19-3/8" x 6-1/4" x  1-1/2"
Inlet 5/8"
Outlet 5/8"
As you can see in the pictures it originally had foam glued around the outside 
that has disintegrated after all these years

Please  compare to your old heater core to be sure this is the correct one you need.