I have a go cart sized Model T I am restoring called a “Tin Lizzie”.
Shriners used to drive them in parades.
I have a small machine shop. Bridgeport, 13 x 36 metal lathe, surface grinder, 8" shaper, and a small horizontal mill. I made a primitive throttle body that housed a fuel injector and a TPS sensor.
I have 10 years of experience playing with microcontrollers. Raspberry Pi, Arduino, and have made a small engine run before with fuel injection. My problem is how complicated and the bulk of the system had become before I had enough to make it run.
I have thought of two ideas for electrical power.
I have a small alternator with regulator i considered.
I thought of making a permanent magnet / wound coil alternator integrated under the flywheel cover, with a regulator of course.
Either way I would use a small 12v battery in the system.
most recent, i have found a 3 phase brushless servo motor with a bad encoder on it, but motor is just fine. I have found a design for a regulator that will work well.