Hi,
once I used heads from ATMR in HTS548, it worked, was a bit slower, but nobody cares about that, right?
U can also use the head of a 60G, but don't touch the platters, once they are loosen, U will never get it centered again.
the 'spare' head might have to be bent a bit so that it shall not be jammed by the ramp.
regards,
pepe