well you can use v6 rear axels, calipers, brackets, and rotors and be done.
but also you have to either run a bigger master mower and a proportioning valve.
i would say anything that will make the swap as simple as possible, but just as affective would be the key.
there is a link on here some where with all the 5 lug swap info. if i can dig it up ill post it up here.
also turbo coupe rear ends have 4 lug disc, so you maybe be able to get some ideas from that.. alot of guys use that for a rear disc conversion if they dont go 5 lug