The HR Parts 'N Stuff (Paul Ferry) motor mounts are a superbly designed and manufactured piece.
The driver side is definitely easier to replace, on the passenger side the downpipe & other stuff get in the way.
Instructions with the motor mounts are fairly clear. You will want to raise the frame of the car about 15-18" and then remove the front wheels. Working thru the front wheel wells makes an otherwise nearly impossible job, possible.