You need an complete engine, bearings, seals, maybe a new crank, a kit, tunable clutch, intake, carb, exhaust, skills and a welder. Cdi or points ignition, pick your flavor.
Fabricate mounts with proper chain spacing, weldem on. Paint.
Then your gonna need to tune the clutch, jet the carb, you'll need a custom exhaust mount....starter clutch lever..
Wiring should adapt pretty easily.
Or, you could take the money your gonna spend and buy a good Puch moped. But good luck!