Nope. All the K-member bolts came out just fine, I had them all out when I did the engine swap too so they had been out before but they came out just fine the first tiem I had them out too. The rear subframe bolts were a ***** though. Be read for some broken tools and have full tanks on your torch if you ever decide to drop the rear subframe.
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.