I can't find the thread where this was discussed, but i did come across some photos of these spacers.
While ford and chevy use a completely different hub assembly between their two types of axles, dodge uses these steel spacers to space out the axle to accept the reverse dish dually wheels. pretty neat.
If i hadn't seen these pics, i would still think Pater is full of ****.
i'm not saying pater isn't full of ****, but he is redeemed on this account!
just wanted to post these in case anyone else was curious about them.