The listings are confused even at
fordparts.com, so you and I are about in the same boat. "Package 1" has referred to the Perf Pkg in the past and I assume it continues to do so. BUT I do see a listing for
2001 (BRSD-1611-A)
Brake Shoe or Disc Pad
Police Version SHO ; SHO Package 1; Severe Duty Pads (Front)
$72.69 $72.69
And that is what I would go with if buying OEM pads for best performance.
They do have a "standard" version also, not what I would use if upgrading.
2001 (BR-1611)
Brake Shoe or Disc Pad
Police Version SHO ; SHO Package 1; Standard Duty Pads (Front)
$87.53 $87.53