Gentlemen,
If you have an issue where you can't get the upper link far enough back to get your pinion angle in phase, then you MAY want to consider either having custom shorter lower control arms made or purchase adjustable lower control arms from Gordon Levy (aka: Levy Racing), Spohn Performance or some other reputable fabrication shop.
In my case, because my drive line tips down in the back (around 2-3 degrees) I had issues with my pinion angle so much so that I had the upper link as far out as I could get it where it made contact with the panhard bar support. To remedy this situation I had set of fixxed lower control arms made at Spohn Performance so that I could correct this issue.
While this is usually not a problem with most standard, by the book Ford builds, it was an issue for me since my driveline is no way even close the stock location which was required to fit my combination into my car.
Steve
Levy Racing's Website:
http://levyracing.com/
Spohn's Custom Work Page:
http://www.spohn.net/shop/Custom-Par...ed-Length.html
Spohn's Factory Five Page:
http://www.spohn.net/shop/Factory-Fi...-MK4-Roadster/
Go Dad Go's Chevy Cobra Overview:
https://youtu.be/_wnHDNgnNqs
Pinion Phasing Demonstration Video:
https://youtu.be/Idk3BVDVHq4