O, thanks for posting those pics,,,,,I didn't have a good shot of an AF centerline kit pylon before
about those outer pylons,,,,,I used D&S C/D and Naval for this,,,,,,,all (not) the outerwing pylons have the rear notch, for weapons or tanks
the difference is the AF used the pylon on the left with a notch cut out, angled as in a pic I posted for weapons,,but with the pylon already attached to their tanks
the Navy used the pylon on the right, with the "weapons shoe" for weapons, and used the same pylon for tanks, without the shoe
hah, what all that means to us,,,,,,if we put a Mer on the AF,,,,,we mount it "flush, but with a small airgap, and angled outward",,,,,,and if we put one on the Navy, we mount it "straight", but with a shoe on there making it point down a bit at the nose,,,,,,,,,,both get tanks that are "straight"
but, the notches do show up very clearly on all the outerwing pylons (on the early jets),,,,,,,,,,,,,,,,,and right after I typed that, I went and looked and found 5 pics of Not-Notched outerwing pylons on an F-4G, F-4J(UK), F-4EJ and an F-4J, the G had an LAU on it, the others had tanks, some pics are on the same page as notched 'sister' aircraft
so, I don't know about the notch, maybe it's an early/late thing?
gottta love Phantomology,,,,,it should be a Master's Program
Rex