From the above link:
In the Navy’s recent budget request, the Navy finally funded the design an acquisition of conformal fuel tanks for the Super Hornet. With the potential to extend the range of the Hornet with a low drag external fuel tank, the tanks can either expand the range of a Super Hornet or free up two high capacity weapons stations by replacing the two external tanks currently used on almost every flight. One option would help to restore a long-range interception role that has been missing from the Navy since the retirement of the Tomcat in the 2000s. With four capacity weapons stations available on the Super Hornet, the SM-6 Dual I SAM could be modified to serve as a long-range air to air missile, much like the Standard SM-1 was modified to serve as an anti-radiation during the Vietnam War.
There are some additional benefits beyond providing a counter to the emerging long-range cruise missile bomber threat. At first instance, the SM-6 would provide a much longer range air-to-air missile than the AIM-120D and help to bridge the gap between the AIM-120D and the longest ranged Chinese and Russian AAMs that are either in development or newly in service. The SM-6 would also provide a more effective anti-ship weapon to the Super Hornet. Notwithstanding, it is a smaller warhead than the Harpoon, the SM-6 provides a much larger kinetic punch than the subsonic AGM-84 Harpoon due to its Mach 4 speed, is more survivable against modern CIWS systems due to its high speed and has a longer range. If the SM-6 were to be acquired in large quantities for airborne use, the per unit cost of the missiles would drop dramatically and allow the missile to be purchased in larger quantities for use in the original SAM role. Additionally, the employment of the SM-6 on the Super Hornet would allow potentially allow for the Super Hornet to widen the engagement range of a carrier strike group in the BMD role.
It's certainly not unprecedented, with the use of the SM-1 during Vietnam, and the Iranian use of the HAWK. The US military seems to be lacking in a real long range A2A missile right now, so I suspect this would potentially be welcome if they can make it work, and it would have export potential as well. An additional application in the Anti-Ship or BMD role is also interesting, especially if it can be adapted for use on other platforms - F-15E, F-16, etc.
Another possibility is adapting the ESSM, or it's latest variant that uses the AIM-120D front end.