Update -
I removed the floorboard. Could lift the engine up maybe 3/8". Easier to get to the motor mount to bellhousing bolts from the top inside the cab, than from below. Still had a clearance problem trying to use any 5/8" socket/ratchet combo. Finally, I used a 5/8" spark plug socket that had the 3/4 end fitting for a 3/4" wrench. I cut it to 1-3/8" from end to end, just enough to clear edge of motor mount. That accomplished the task. The motor mounts were definitely toast. Still have to reinstall the floorboard.
Rick