What kind of shocks?

Metal fatigue. I had a '64 some years ago, and the rear leafs were cracked in half. I am guessing that after 60 years there is a danger of the same thing happening here, but it hasn't.

Torsion springs on the front, same concern. Sixty years is a lot of twisting, and I am concerned they will fail from metal fatigue, too.

Or maybe this is all in my head, and they will keep on going with or without stiffer shocks.

My driving style is sedate, conservative. Not looking for something to allow me to corner at highway speed.