Join us on Facebook: Search for 'ConcoursMustang' Private group!https://www.facebook.com/groups/concoursmustang/Indiana SAAC Fall Classic , French Lick, IN Oct 11-12http://www.insaac.org/SAAC National-Sanctioned Concours Event
Most of the 65-66 G shocks I've seen were for handling package, -B fronts and -C rears. Agree with Jeff that there were different suppliers. The C4ZF engineering number in this case is a Mustang-only application.