Design limits of a high-angle quad 11-inch turret

How large and heavy would a quad 11-inch turret with 75-80 degree elevation be?

There is no single figure: the required size depends on desired rate of fire, shell weight, training speed, loading gear, and the power used to move the mount.

A precise figure would be misleading because the design variables drive one another. Turret movement can be made quick by reducing weight or adding power, but both choices affect machinery, protection, ammunition handling, and structural support. Shell mass and loading rate also alter the physical scale of the mount.