If I'm not mistaken, these wheels were used on 70 Boss 302's, 1971 Boss 351's, and as an optional wheel on 70/71 Torinos and are all identical except for the date code. An easy way to spot them is that they have a solid center without the 4 openings between the center and the wheel rim, and as far as I know they are the only 15 x 7 Ford bolt pattern wheel that use this center. They are tough to find as not many Torinos were optioned with them and they are really in demand with the Boss 302/351 guys.
Heres a pic from the Classic Cougar site that shows the center without the openings, and another pic of incorrect wheels that shows the opening I'm talking about.