Atlas axle is from a Capri, its recognisable by the pigs nose casting and the access cover on the back of the axle. Quite a lot heavier than as English but the axle of choice for most Escort rally cars. Many rally car preparers an F2 stock car racers do a conversion do disc brakes ar a price. For a diy approach, choose some suitable calipers, mine are Peugeot 106/205. Early Fiesta top hat front discs. Make up caliper brackets, these can weld on, or bolt to the old backplate mounting points. If I remember correctly you need to retain the wheelbearings with some spacers. The flanges of the halfshafts need facing up in a lathe to provide a flat mounting for the discs. Its all pretty simple stuff. i fitted a balance valve in the rear circuit, but with 4 pot front brakes I have it wound fully off. The drive flange on my diff is Anglia which is smaller than Escort.