I just did a conversion over this past winter, with the help of the folks on this forum.
Used 80 NYer 11.75" rotors, 75 (?) Dart spindles, an a "new" style mstercylinder from Cass at Dr Diff (awesome to dealwith!)
No power unit.
Replaced the rear brake cylinders with thoe from a mid 70s dodge pickup.
I used a wilwood rear prop valve. honestly it is almost wide open right now and I have had no rear lockup issues yet. Knock wood.
The car stops pretty good, though I wouldmt mind power assist soemtimes. But overal WAAAAAAY better than the drums I had...I dont hav to plan ahead to stop anymore...LOL
It was not too mad money wise...but i had to search for parts....the advantage of the kits is its a one stop shop, but at a price.