The new ones are normally slit lengthwise so you just pull it open and snap it over the bar and bolt it down to the K-member again. After of course you have the sway bar unbolted and the old ones removed. It is that easy.
Former owner of 94 Bird with DOHC 4.6L swapped from a mark VIII
2011 CTS-V Wagon
1968 Torino was an original 289, C4, fully documented numbers matching car. Now: DOHC 4.6L/T-56 swapped, Cobra intake, IMRC delete, BBK long tubes and H pipe. Dynotech Aluminum Driveshaft, 9" rear with TrueTrac and 4.11's.