it has been done. the guy who'd done it used to have a web page showing exactly what he'd done. there was a link to it on chevytrucks.org. i just found out it doesn't exist anymore. he used a 90's model 3/4 or 1 ton rotor & made a caliper bracket from 3/8 or 1/2 " plate. don't know what he did for bearings. i know this can be done! if you keep looking you'll find a way. then you can write back to the editor of classic trucks & tell him you're a real hot rodder & you can update your truck without all those mailorder kits they advertise in his rag!!
you are the guy that wrote them asking this same question right? i sure wasn't impressed with his answer.