[H. L. Chauvin]

FWIW:

A. For real long term sheet metal harmful effects when driving on back roads, my 1930 coupe, (always driven in rural areas), came with no shocks in 1958.

B. With constant bouncing without shocks, all body to chassis bolts at wood blocks had already pulled through the metal sub-rails and had already been repaired with welded flat steel plates.

C. Fractured over-stressed inner sheet metal body braces were found cracked almost everywhere, caused by the very pronounced twisting effects of a typical non-rigid Model A riveted chassis on 1930's and 1940's rural roads & railroad crossings.