If you go to a T5, the speed sensor that let me keep my original Ranger mechanical drive speedo, but also supply the Mustang A9P computer the speed signal it needed, was Napa part #NOE-600-4273 or a Dorman #917-614 - It works with any classic Mustang speedo cable.
My conversion u-joints to use a shortened Explorer Limited aluminum driveshaft hooked to my Ranger 8.8" 4.10 w/Torsen from an FX4 LVL II, were a 1310-1330 Conversion u-joint Moog-253 - https://www.summitracing.com/parts/mog-253
I used a billet Tilton hydraulic slave cylinder with the factory Ranger clutch master cylinder but I advise against it. My Tilton has been problematic with the flat faced throwout bearing that Tilton uses. Junk Chinese bearings that they charge $50 each for.. It's a super nice piece if I can ever get the bearing to last - http://tiltonracing.com/product/6000-series-hydraulic-release-bearings/