newbie needs help on 1970 Western Flyer SS400

[RS330]

Alright this is my first mini bike, yeah its old school and I'm planning on doing some stuff to it with the original engine. But I need help on figuring out a way to generate power and hook up to a battery like an alternator of sorts, I took off the the flywheel hoping to maybe figure out a way to hook up charging coils but no room from the magneto, I'm not really sure how much power the magneto itself generates I figured it would only be enough to give spark, my plans are really to hook on a headlight, and eventually a full pump and oil pump for later modifications. But any help would be greatly appreciated, the engine is a 177cc Tecumseh 4hp model: HS40-553940 Serial: 3029B I'll try and post pictures soon. Thank you