Sept 2009
66 Daytona Gas cap   (SDC Forum #32783)

Pictures of the chrome and locking gas caps are on page 11 of Turning Wheels October 1986,
 locking gas cap AC-3195 and chrome gas cap(standard on Cruiser and Daytona)#1558712.If it's 
a Stant locking cap that you want, the part number is 11483 (carded)or 10483 (boxed).Advance
 Auto Parts SKU number is 15480001.I paid $14.98 for mine.