I assume you want to go with an alternator when you do the conversion.
The most common and economical alternator is a Delco 10SI 'one wire'. The one wire is just what it says, only one wire to connect.
You can probably buy a mount bracket, or if you're handy, make a better one. The aftermarket brackets are usually not the best, and you need a good, solid, straight mount. Also will need to buy a wide pulley for the alternator to match the wide pulleys on the engine. You can sometimes use the original generator pulley if it will fit.
As for the wiring, I have never seen a premade wiring harness, or even a wiring diagram for an alternator conversion. Eliminating the generator/regulator wiring simplifies the whole story. All the generator and regulator wiring is eliminated. If your wiring is still good, the old charging system wiring can be trimmed away or taped out of sight.
The 'one wire' from the alternator simply attaches to the positive battery cable, usually at the starter contactor to keep it away from the corrosive battery.
The system will need to be changed to negative ground if it's not already.
There will need to be a 1 1/2 ohm resistor added to the ignition coil circuit. Any lamps or accessories will need to be changed to 12v.