LOL....final outcome. Sounds so ominous.
The grease stayed put for a looooooong time, eventually becoming streamlined (extra mpg!) and thicker as is collected dust. I had many interesting conversations with mechanics in the meantime, some who unwisely ignored my warnings to be wary of the underside of this ford.
Eventually the mods in my sig proved too much and the low teens milage combined with the rock hard springs and the ear ringing delicious sound prompted me to move along autowise. I was shocked to learn that there is not much market for overmodified cars covered in grease. Eventually, the car and all of its pristinely preserved parts found a good home at Menard's in NH. I donated the car back to the parts guru who helped me for so many years to find all the parts I needed.
It was a great journey.