Lots easier than methods I have used before. I had 4 doorways to shim up to some fir flooring. I needed to fit the carpet to a 1 inch height. I used 3/8 shims with a 3/32 shim added under the strip to get the ideal height.
I didn't think Model A's were that heavy.Before they closed there was a couple of car factories that had that type of flooring-end grain. But the were pieces about 6" deep.
It was for the horses. Soft on their hooves, besides Model As were solid steel, not like the plastic cars of today.I didn't think Model A's were that heavy.