North Racecars sells an awesome rear kit. Its not cheap, but its new and includes upgraded axles. This is the kit I used - 03 Cobra wheels fit like a glove on the rear.
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Jeff
93 Coupe - check out my blog -
http://www.93coupe.com
01 Cobra - Stockified - Wife Owned and operated
68 Coupe PROJECT <- Been in the family for 25 years!