I found this on Summit Racing. It converts our dana 60 rear into a locker. If I ever blow out my spiders again this is the route I'm going to take, or if you blew up your spider gears this would be a good option compared to buying a complete Detroit Locker rear end.
http://store.summitracing.com/egnsearch.asp?Ntt=locker+dana&N=700+115&Nao=30&Ntk=KeywordSearch#rstop
http://store.summitracing.com/egnsearch.asp?Ntt=locker+dana&N=700+115&Nao=30&Ntk=KeywordSearch#rstop