Disc brake upgrade

I have a 74 Duster. Originally a slant 6 car, so original drum brakes all around. I would like to upgrade to front disc brakes now that it has a transplanted V8 Magnum motor in it. I would like to buy a kit that would include all necessary hardware, including hydraulics. Like to stick with manual hydraulics. Existing wheel bolt circle is 5 on 4". Any suggestions would be appreciated. Thanks, John