[GeneBob]

You want to be biased to damping more on the rebound stroke. A bump on the road sends a shock into the car through the spring and heavy compression damping just adds to that shock. You want the spring to compress easily to reduce the shock to the car, then absorb the energy on the rebound. I don't think stock Model A shocks have any bias. However, I rebuilt my rear spring and replaced my front spring along with getting the shocks rebuilt by John Holland and it drives much better now.