Sachs shocks on an A-body?

I don't believe that about KYB's across the board. While not the best, KYB is a decent bottom shelf budget shock if you get the correct ones for your application. In some cases like ours they have 1 option of up to 25% stiffer than stock, so yeah you'll get a firmer ride which comes with better control than stock spec replacements. If you have a high performance suspension like larger torsion, sway bars, etc and expect good rotation and control in and out of corners any stock replacement shock will not be acquit.

What is your intended use of the car?