(Slams pedal) skrrrrrrrrrrrppp....

Howdy howdy howdy my fellow "Moparians", just a quick brake question...
Iv got a 72 Duster 440/727 currently not running, BUT hopefully soon to be. And when it is (or possibly before) i want to get rid of the tired ole drum brakes thats on er'. Now i aint exactly made of money if ya know what im sayn so what i would like to know is what would be the best BANG for my buck when it comes to disk brake conversion kits!? ... Any advice would be highly appreciated! :stop:=D>