66 is a year I'm not real familiar with on the Ranchero. However, if it has a Falcon frontend, it's got the Falcon running gear. If it's Fairlane, then... reproduction sheetmetal will be next to non-existant( Hemmings Motor News- they have everything in there but you may pay the price) Maybe floor pans are reproduced. The rest you'd have to make yourself or hire someone to do it. Front discs can be had via Granada swap. Those years already had V-8s so trans mounts can be found or made. Clutch pedals would be for whatever frontend is on it. 'Hope this helps