worn snub mount symptoms

[andyg plym]

what are they apart from the engine being a bit slack?
does this stop the engine from going up and down? ive got a slight squeel under lift off throttle.like a rubbing tinney sound.engine mounts replaced and has improved.
think either drive shaft is fouling(poss on zorst) or prop under car is being put at an akward angle.
centre bearing fine