10. Our Sept '72 U.S. s/n 4366 production car had the factory effort reduction kit plus the outside fuel filler door plus a few more L changes, but the early 2-pod dash and a left-side wiper park. Don't believe the pubs that list exact change-over s.n's for L model parts. DeTomaso never threw anything away that he could sell....
11. Clutch parts, as you've found, vary too much in thickness etc from suppliers to definitively list, and the space available in a Pantera bellhousing is very limited. Mustang parts simply will not bolt on without rework, generally speaking. To add to the confusion, the clutch spline on early '71 ZFs is 1-1/16"- 10 (GM) while all others are 1-1/8"-10 (Ford). So a late 'spinner' or clutch disc will fit- loosely, on an early ZF but not vice-versa.
There are different series of clutch throwout bearings, too. Assume that EVERYTHING replaced in the clutch area will need adjustment if not rework. This is why we usually direct those needing such parts to a Pantera vendor rather than trying to piece stuff together from god-knows-where. In your case, shipping costs to the UK dictate that you needed to 'reinvent the wheel', so to speak... Ultimately successfully; congratulations.
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