My 1977 300D only has one engine shock, but I replaced it prior to replacing my motor mounts. I do know this.......a good engine shock will not compensate for bad motor mounts. With good motor mounts, I can't imagine that back engine shock(s) would make a huge difference,,,,,but I've been wrong before.

JCD

PS,,,,you must be in the US.....hope all is well and look forward to the next NJ meet.

JCD