I replaced one in a Dart last year and in my Charger this year and I got them both from Auto Zone and they both went in with no problems. I hear some guys talk about fitment problems but I have not experienced it. Both were less than $50 each.

‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring
‘14 Big Horn, Quad Cab, 4x4, 1500