Ask him if he's ever used a cigarette paper to adjust the clearance between the pinion and the ring gear, or used a dime to set the points.
Or used a grapefruit shoved over the fuel pump to keep it from vapor locking.
Or put clothespins on the spark plug wires to make the fire jump to worn out spark plugs.
There's so many things we used to have to do because we didn't have the money to take them to a garage.....and cars were a LOT simpler then!