http://www.classiccarautoparts.com/ford_discbrakes.html says they use the current drum brake spindles, that would be nice not to have to change look around for donor spindles. Just buy the kit and install
Or you can just get it cheaper from: http://www.discbrakeswap.com/ I know willwood sells a kit that uses the drum spindles. A lot of the brazilian cars are using those, also maverickman is.