ok I have a 99 mustang gt 5spd convertible with a bad motor, I was looking through listings and saw quite a few dohc's vin v the same price as the mustang engines vin x. These where mostly out of 08 and newer crown vics. They are flex fuel engines, and I was wondering how complicated the swap was? If there is a good thread somewhere I cant find it and any help would be awesome. Thanks