Just as Bob Putnam pointed out I believe your problem stems from either the lower control arms being welded up improperly or a missing thrust washer! Shim stock is normally used on the rear mounting bolts of the Jag Fulcrum arm shafts to adjust Toe In. However 0.65" is way too much. Contemporary started shortening the Jag XJ6 and XJS Lower Control arms when the narrower Jag XKE pieces started to become scarce and expensive. These XJ6 & XJS Lower Control arms were shortened and rewelded in a gig at the Contemporary Factory. If yours were welded up by someone other than Contemporary I would be very suspect of these pieces. One other possibilty is that you maybe missing a thrust washer between the chassis crossmember and the lower control arm. These thrust washers are just over 1/8" in thickness and look like a large Fender washer. Check both sides of your crossmember where the pivot shafts go thru. Make sure these larger diameter Thrust washers are located on both sides. If you need to replace your Lower Control arms I can assist you by selling you a set of Billet Aluminum Lower Control arms.
Happy Holidays
Bill Connelly
Upstate Super Replicars, Inc.
former Contemporary Classic dealer
www.daytona-coupe.com
427cobra@compuserve.com