15x5.5 11-66 wheels

[shelbymann1970]

So I got a bunch of steelies and going through them today I found some observations on my 15x6 wheels as far as offsets go. When I bought my 68 that was sitting since 1973 it had SNOW tires on the back. After getting the tires off of them and having a blaster blast them(a friend did all this for me) I found those 2 with snow tires to be 11-66 KH wheels. 15x5.5. Can someone tell me the applications these wheels were used on? My other 15x6 non Shelby wheels are 1969, 1970 and 1971 with the center hole being larger and about a 1/4" negative offset compared to my 68 Shelby wheels. Thanks. Gary