1st gen disc upgrade

[85Ram50]

I geezer or someone told me that the second gens would work. I looked up the hubs for an 87 Ram 50 on RA and they don't look right http://www.rockauto.com/en/moreinfo....096275&jsn=574 My spindles are smooth and widen at the back side that grooved hole wouldn't work. Otherwise its exactly what I want as far as calipers/rotors go. If that is not the right hub assembly let me know the correct years and models to look at so I only have to make one junk yard trip.
Thanks