That won't work. It doesn't take up the amount of chain growth that a FS setup will have. A Paul Melvin or just a rear derailleur will be the only way to make it work.

Any sort of locked-out rear shock would work, if your chain never gets stretched and you manage to find a magic gearing.

Never mind the fact that eliminating the rear suspension with a lockout or the solid bar (horrible, horrible idea) basically just leaves you with a very expensive, fragile, and flexy hardtail.