[kris-kincaid]

If you get a used Jag diff for say $500, then get ENTDOC's source for rebuilding them at $400-$500, then buy Kirkhams $375 adaptor to mount it, you're at $1375 or so. Does Kirkham include the drive flanges to hook up Cobra half-shafts to the Jag diff in the $375? If not, add that on.

In the end you're saving $3500 or so on a $70,000+ car. Nice!