Re cars:
@Null you are talking about something like a 1980's "square body" C/K chevy truck. (C=2wd, K=4wheel drive)
Mechanical carb or crude but reliable TBI fuel injection in the later years.
The automatic transmissions (TH350,TH400,TH700r4) use mechanical brains to operate. No computers.
They also came in manual transmission.
The HEI ignition system is basically just some transistors and capacitors. You can find the schematic and make your own if you want.
They small block chevy engine in them is the most common made motor ever and you can still get brand new parts for it.
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