Spokeshave.
My 78 Ford pick up nearly finished rebilding
Front end suspension and brakes
Changed 3 spd gear box for a 4 speed with overdrive
Rebuilt the gauges console and turn indicators.
New tires all round and shock absorbers.
Very few people restore and upgrade cars like that. That would be a minuscule market. Maybe 1,000 customers per year doing custom EV retrofits to old classic and hope-to-be classic cars.
But your everyday driver / commuter car? No way in hell would such an investment be warranted in a worn-out econo-car.