Inner Fender to Front Shock Brace Stiffening?

The upper shock mount is spot welded to the inner fender in multiple places from the factory. If you look for them you can usually see the dimples where the spot welds are.

Also, keep in mind that the weight of the car and the suspension forces from the torsion bars are carried by the K member and torsion bar/transmission crossmember. The shock uprights only support the shocks, which don’t carry the weight of the car, just dampen the action of the torsion bars.