Is it possible that mod devo12 to f12?

Is it possible that mod devo12 to f12?
add a 5.8G receiver module like this :
of cause ,it need DEVIATION support.

If the inside of your transmitter has space for it like this:
upload.wikimedia.org/wikipedia/commons/6...ight_off_the_PCB.jpg
Then possibly yes. No guarantees, though.. the monitor may be different or more components may be missing, or even the firmware may be unable to switch the monitor to FPV mode.