I just sold my 98 Mark 8 LSC in Dec. Had the new esv coming and I couldn't stand the thought of leaving the LSC outside or driving it in the snow and salt. They pound the roads with salt here.
Back to the topic.
I owned 2 98 LSC's. The biggest flaw I found comes from vibrations at 80+ mph. If you look in the rear view mirror it's blurry to a certain extent. The cause is Fords decision to use a 2 piece driveshaft. A lot of owners that own gen 2's replaced the drive shaft with the metal matrix unit. Costs about $400 but worth every penny to have a vibration free car - this only affects 97-98 models.
When you buy these cars make sure the blend door isn't broken otherwise you won't have heat. A $25 part that may cost up to $600 to replace at a dealer - dash comes out. The rear neon tail lights have been known to go out - most replace the balast. THis light is $600 at the dealer and hard to find.
Use quality front rotors otherwise they warp easily.
THese are great cars if they have been maintained properly. ALthough I have a new car I miss mine already. Good cars as long as the previous owner kept up on the maint.