The air suspension can be a pain in these cars, but is actually really simple to maintain, diagnose and repair once you learn the system. All the parts can be had relatively cheaply if you know where to look. NEVER take one of these cars to a dealership for air suspension repair.
The VIIIs had the air compressor/ dryer low inside the fender...moisture collects easily in the compressor and ruins it. The VIIs had the assembly high up on the inner fender, easily accesible to work on.
The early-gen HID headlights on the gen-II VIIIs are notoriouz for early failure and very expensive to repair. Ford offers a kit to convert them back to standard halogen bulbs, but even the kit is $800 or so...
The HO 5.0 w/ AOD trans in the VIIs are bulletproof...the 4.6 DOHC in the VIIIs are dependable, the AOD-E less so.
I have three MK VIIs...I love 'em. An excellent blend of muscle and luxury.
I had an VIII. Decently quick, but just too problematical. Sold it first chance.
Interesting trick for the 4.6 DOHC engine: they were rated at 275 in the Lincolns, the same motor was over 300 in the Cobra Mustang.
Place a piece of wood on top of the fuel pressure regulator, give it a sharp rap with a hammer...somehow it feels like you gained 50 horsepower.
Don't exactly know what it does to the regulator, but I assume it allows it run at a higher pressure to the injectors. Whatever it does, it works pretty well.
No problems ever after doing that, just better performance. I met several guys that did this.
Strange...