Only McDonnell's and Grumman's designs were able to meet the Navy requirements, and McDonnell's only barely. Grumman's design was head and shoulders above everyone else's. But like all the designs, it was based on the Gov't being able to deliver the F401, which didn't happen. The F-14A was never meant to be a production model, it was supposed to be a development version of which only 13-69 would be built to d a lot of the testing since the airframe was running well ahead of the engine development. The [original] F-14B was to be the first production standard model with the definitive engine and other changes for series production (including an APU). In effect what happened would be the equivalent of the vast majority of F-22s being EMD models.