Decoding Wheels

[VINCE Z28]

I need a little help decoding some wheels. The guy selling them says there are Ford (rally wheels). To me they look like factory 1970 Chevelle Super Sport wheels. The numbers are stamped on the back side of the wheel.... M1   6    17    MK    with a  number  6 under the M1. He said the wheel are 14 x 7                                                                                                                                           

[x66 714]

"AO" & "YA" is the code for the SS wheels. It is by the valve stem on every one of that type wheel I've looked at for GM. No code, not GM. Ford used them also...Joe

[Danzo]

X2 what Joe said. See pic.
Doc

[VINCE Z28]

 Ok so there are not GM. Lets say they are Ford wheels then.... what is M1   6  17  MK. What type of car they are used on?

[maroman]

What is the bolt pattern?

[VINCE Z28]

Here is a picture of them.

[firstgenaddict]

Between the 17 and the MK there is a slight impression of a FORD oval.

[VINCE Z28]

 James, what year do you think this wheel is for? Vince

[169INDY]

ford mustang magnum 500 wheels (NON Chrome version)
,,,,From a F*RD Site,,"Magnum 500 rims were actually available as early as 1965. I have an original 1965 Tire Ad with a 1965 Mustang Fastback wearing them.

 Most forget, Original 1966 GT-350 Magnum 500 rims were painted, Not Chromed. A lot of modern day "restorations" use Chrome Magnum 500's because they like the look, but the originals were painted when originally sold with Shelbys. Chromed Magnum 500 rims were available though through most tire dealers of the day back in 1965-1966.
"

[VINCE Z28]

You mean I passed on original 1966  GT-350 magnum 500's