Well, i just did my 3/4 ton conversion on my 10b and the parts i used was the backing plate, spindel, rotor, and selectro heavy duty external hubs off of a 76 K20. why dont people use these oldie parts, there so much beefier than the new stuff. the backing plates are really think all the way around and the hubs, oh my god, the hubs are so cool. there easy to use and set up and there beefy. so why doesnt anybody use this style hub anymore. when people do the 3/4 hubs on there 1/2 ton, why not go and look for the 76 and older stuff?