Side bumpers - as you know.
The number of spacers depends on how it sits once you have it installed, IIRC. I think I also used one.
no idea: "1 x M6 18mm flat head hex socket screw"
Here's the link to my install pictures:
https://www.talkmorgan.com/ubbthreads.php/topics/827676/re-m3w-services-motor-mounts#Post827676
