Yes, the dynatrac kits are good, but fairly costly in my opinion. I personally wouldnt do it for the hubs, I'd do it for the wheel bearings though.
when it comes time for new bearings in my 98 12V, Im going to put a late 70's ford dana 60 up front. good shafts, hubs and good bearings.
the reason why Warn does not offer just a hub for these truck is because it cant be done. for starters, the stub shaft (the outer most axle shaft) is not splined long enough to engage with a hub. second, there is no place to just mount a hub.
That is where dynatrac came in. They retrofit our crappy unit bearing with a service-able bearing assy. they use WARN hubs, also.
The other advantage to the Dynatrac conv, is you can also get real Dana 60 1. 5" 35spline shafts. our stock 60's have Dana 44 (read: 1/2 ton) sized shafts inside them. They are not real D-60's.
My only drawback to the Dynatrac kit (other than the $$$) is the fact that even after you drop the $$ and have all the good internals, you still have the crappy cast iron sleeve where the CAD once resided.
I have seen one of them break.
Soooo, might as well run a ford 60 and have all the good stuff!!!
Later,
Jeff