http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2414548893

for 260, but i *think* it would fir 70-78 Z cars..

Lock set would work, but the iginition switch might require some re-wiring... not sure if it will work in all the cars as there were quite a few changes in wiring and most importantly the connectors over the years.