Do you plan on upping the power later on?
If so, maybe look into a dual disk clutch.
Otherwise luk is the norm.
Looks to me like part of the TOB was behind the pressure plate.
For the UVCH, that's the norm actually. The glowplugs tend to burn the harness. I would replace the glowplugs, and do the UVCH and pigtails. Stick with motorcraft. Also you upgrade to the SD style with one center plug.
Sent from my SAMSUNG-SM-G935A using Tapatalk