Good Morning, Steven. I've missed you since we moved from Fort Mill years ago. I hope I can jump in here without hijacking your thread.
Our MkI/II is 16 years into the adventure also and we are ready to move ahead with Richard Oben's A/C-Heat so we can enjoy the next 16 years (Dang.....I'll be 91 then!!). The North Race Car site has some photos that got me started. You have probably seen them. I have not yet identified anything that can't be handled with time and patience.
You may have probably already been here too, but the below got me started in my thinking about issues:
https://www.ffcars.com/forums/17-factory-five-roadsters/236306-air-conditioning-roadster-yes-no.html
I would be interested from others about their experience with any relocation of the WIPER MOTOR and IGNITION COIL (MSD Blaster II for me). These two seem to be problematic in our completed roadster.
Phillip