Son's is very similar, but, we went a bit further with the mods.
90 r/c originally from Iowa. (no a/c)
matched dana 60's w/discs
NP4500
South Bend single disc good up to 800lbft
NP205
'92 6bt
intercooler/radiator/AC condenser from a '96
had to get a dash from a truck that had A/C (needed vents, you know)
Since dash had to come out anyway, going w/total new instrument cluster.
That's all that's keeping 'er off the road right now. Waiting for a nicely-matched set of guages so the dashboard guy can construct the new cluster.
During the few weeks we had it at "functional, but could be nicer", it was quite a solid, reasonably quick rig.