Those look like the first gen Bullitt style wheels...17"x8", should be with a 5.72" backspace--even with the wider axle, you still need spacers, or is it to keep the wheels off the springs?
The black ones on the rear are early, the grey ones are the late. The late ones have deeper, "incorrect" backspace. See my update here:
Some guy "on the www" claims you can tell by looking at the valve stems. The early ones "cut in" to the polished outer rim, IE are further "out." The late ones have the stems inside the polished outer rim
