hey, i know the SD pattern is 8x170, and the old pattern is 8x6.5, but it is SO close to being the same, is it possible to put sd wheels on an older ford?

 

is it POSSIBLE? Maybe..........is it SAFE? nope

 

well 6.5= 165 so this is 5mm diference. i doubt it will fit, but might get somone who tried it. 5mm dont sound like much but for clearance and lugs might play a big role...

hope this helps any...

 

It's not only a lug-spacing difference. The SD wheels are known as a "hub-centric" design where the center pilot supports the weight of the vehicle and centers the wheel for radial rotation. Older trucks (with the tapered seat lugnuts) use the lugnuts themselves (or a combination of the hub and lugnuts) to carry the vehicle weight/center the wheel. And no, the pilot holes are not the same diameter.

Since the lug nut holes in the SD are not tapered, standard lug nuts won't work. Besides, the thread pitch on the SD lug nuts is like M14x1 and are WAY more coarse threaded than the older trucks.

The BEST way to do this conversion is to take the wheels to a machine shop, have the existing holes enlarged and offset drilled to 6.5" c/c spacing, and then have steel tapered seats pressed into them.

ON EDIT:

Even if you do this, you'll still have to locate a tapered-seat lugnut that will allow the use
of the stock center caps that latch onto the stock SD lugnuts.