I haven't looked it up, but I think 70 switched to JY mid year. I have a bunch of different 5X5 15" and they all appear the same to me, except for 2 that don't have the 3 cut outs where the center cap goes. I don't recall the code, but I think they are later model wheels. There is also a slight ridge under the trim ring, and the ring fits slightly differently. If I didn't point it out, most people would never see any difference, because it is slight. I used them on the rear, because the only way to attach the center cap was with the plate and center screw, which would hit the bearing cap in the front.
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