Caliper-to-wheel clearance issues, Z? Probably have to have at least 20 inch OEM wheels. May work with 19", but with a spacer? You can get remanned calipers at the auto parts store, but make sure they give you the right product and have a solid exchange policy just in case.
Here's how to spot the right calipers (in addition to different brake pads, "the pp for 13+ also come with silicon seals and drilled pistons in the calipers for much better/higher heat tolerance. Youll know the pp's by the signature red silicone seals. "), as pic'd by mrhighcaliber ...
http://shoforum.com/index.php?threads/2013-brake-retrofit.131238/#post-1446255
I think the master cylinder and brake booster are the same across the Taurus line, so you would be spared that upgrade.
(non-PP)
BRCF-213 Front Disc Brake Caliper Police Version SHO ; SHO, Less Version Packages; LH
BRCF-212 Front Disc Brake Caliper Police Version SHO ; SHO, Less Version Packages; RH
BRCF-211 Rear Disc Brake Caliper Police Version SHO ; SHO, Less Version Packages; LH
BRCF-210 Rear Disc Brake Caliper Police Version SHO ; SHO, Less Version Packages; RH
(PP)
BRCF-209 Front Disc Brake Caliper Police Version SHO ; SHO, SHO Package 1; LH, Service Part May Differ From Production
BRCF-208 Front Disc Brake Caliper Police Version SHO ; SHO, SHO Package 1; RH, Service Part May Differ From Production
BRCF-238 Rear Disc Brake Caliper Police Version SHO ; SHO, SHO Package 1; LH
BRCF-237 Rear Disc Brake Caliper Police Version SHO ; SHO, SHO Package 1; RH
The caliper brackets, brake splash shield and brake vacuum supply manifold are also different, based purely on pricing.