Keith,

Your F-14 will easily accommodate four of the large air tanks. Use three large plumbed together just for the gear. Use the fourth large tank for doors. Use the two small air tanks for brakes, canopy and speed brake.
The three large tanks plumbed together will give the greatest volume for the gear which will help give at least three clean cycles of the gear. Get out of the way when you flip that gear switch because the cycle will be powerful if you're using the proper valves.

Cheers,
Joe Grice