The info I have seen since the late 1970s was that Grumman & the USN had tried to use one type of bomb pylon on the F-14 and found that the bombs weren't being ejected clear of the trough between the engines, and tended to bounce off the aircraft skin on their way aft out of the trough.
I note that when the USN qualified F-14Ds as "Bombcats" they used a similar ejector that was also mounted on fairings like those of the AIM-54 - just like the original test aircraft (and the Iranian F-14s) did - so I have started to question the old info.