[Daves55Sedan]

I have done it before (more than once on different '55 and '56 fords).
It's kindof a bear, but you do not need to do anything with the motor mount.
I seem to recall pushing the starter motor upwards as you pull the starter out. The top of the starter will be up against the brake line routed along the frame crossmember, but it is enough to disengage the starter from the ring gear and remove it.
Remember to remove the starter cable first. Also, the starter drive is obviously engaged with the ring gear at first, but if you push the front of the starter motor a little toward the engine block it will disengage enough to pull starter and bendix out far enough to clear the bellhousing.