No, if you use aftermarket deck-shocks. Note- the upper eyelets unscrew on these. In case you intend to use NOS or rebuilt Sachs deck-shocks, mounting them upside-down can be an advantage if you also intend to actually drive the car. Mounted the 'factory' way, thrown-up water runs down the shock shaft and if there's the slightest opening between the traditionally loose fitting shock-boot and shaft, water will get inside. Sachs thoughtfully provided a steel ledge where the shock top is welded on, so that plus the tighter fit of the bottom of the boot to shock, generates a nice reservoir to hold that water for a good long time.
The standing water corrodes and pits the shaft and wrecks the seal, which may actually be partly submerged. Mounting the shock upside down fixes this condition. Some owners who insist the factory way is best (even when its inadequate) drill a tiny drain hole below the boot in that ledge. But its not crystal-clear where you should drill, since with the decklid closed, the shock is slanted, rather than vertical as when its open.
Same cause and same recommendation to drill drain holes in the lower rear frame rails, which fill with more thrown-up water and rusts- this time in a structural part of your car. POCA has published a diagram of where the drill holes should be added. Check to see if a thoughtful P.O. drilled them.