There are a few advantages to the 2005+ D60s.
1. Larger axle tubes.
2. Larger knuckles than the previous ball joint version or kingpin knuckles.
3. Room for big bell RCVs or 1550 u-joints in the 2005+.
4. 35 spline stub shafts, stock. (older versions have 30 spline and nobody wants that)
5. 10” ring gear as opposed to the old 9.75”. I think this might be moot once you regear. I have heard that 10” ring gears fit in the older castings and the aftermarket gears might all be 10” now. I have aftermarket gears in my kingpin 60 but I don’t know how big the ring gear is.
If you’re worried about the bolt pattern, do what James said -OR- since you’ll likely be swapping rear ends anyway, run a matching Ford 10.5” rear. Wheels are readily available for that pattern, now.
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