ok i have a 1970 ford maverick with the 4 drum breaks how easy would?

LOL There's no frame on a 1970 Maverick. It's unibody!

Probably the easiest (and most likely to work), if you can find one, is to get the parts off a later model Maverick or Mercury Comet. They started coming with disc brakes as standard equipment probably around 1972. To do it right, you want to change the Master Cylinder and Proportioning Valve too, then just swap the whole knuckle assemblies from the donor car. Everything between the upper and lower ball joints. The main thing there is to make sure the bearing contact areas of the spindles are in good shape. You should be able to find new rotors/calipers/hoses/bearings/pads and the like if you need them, brand new, easily and cheap.

1985-1995 Escort? Give me a break!

1970 Ford Maverick Parts

The steering knuckles will have to be changed so you have a caliper mount. Don't know what exist for the rear since you need to come up with some type of caliper mount, though I'm sure something exist.

Also, braking pressures are controlled by a Proportioning valve (drum brakes), this compensates for brake spring pressures and reduces chances of rear wheel lockup due to weight shifting forward.

On a front disc/rear drum, you have a combination valve, this is the proportioning valve and a metering valve to control pressures to the front disc.

I don't see it done in an hour.

An escort might work. 1985-1995 or so. Mustang may work. That is a big job if doing shade tree style. To swap out or replace brakes I usually do a frame off restoration/modification, do it once, do it right.

Brakes are fairly universal items, since you are destroying any authentic or OEM aspects of the vehicle, may as well do it right, once.

I would seriously want to inspect the frame, that is why I would go ahead and remove the body panels, motor and everything off frame.

My buddy bought a 71 Merc, took the body off and discovered the frame was so rusted and week, it was easier to just put the body on an 85 ford (whatever).

That whatever part is where it gets crucial, why ruin a classic.....

well I can tell you that you don't have to do a frame off restoration to switch them and my friend did it to an old car in his garage in one weekend.