Mike - The big ride height difference between the Granada / Versailles spindles and the earlier parts is the distance between the spindle centerline and the lower ball joint mount. The Granada part has its spindle moved upward on the upright so the wheel center is raised (therefore lowering the ride height) - but the spring / shock /bump stops etc remain as before. This change made room for bigger brake rotors and got the upper ball joint away from the tire sidewall.When springs are cut - the shock settles to a different point on its internal valving - and you get a different rebound rate at static ride height than you had before.
The Granada upright takes a "small pin" lower ball joint that older Fords (like my '56) don't have - so you end up having the lower taper opened up to the "big pin" size for a direct fit. The Versailles upright is made for the big pin size so it fits "as is". Many use the Granada upright and "selectively" open up the lower taper to maximize the ride height change. There can be a down side to this if the ball joint pin is not properly supported. It needs seated enough so that the full strength of the pin is utilized - and the retaining nut is fully engaged.