How heavier guns reshape a 7,000-ton design

How would fitting twin 13.5-inch guns instead of 11-inch guns change this roughly 7,000-ton design?

It would probably grow to 9,000-10,000 tons, with a thicker belt, a revised 6-inch secondary battery, and more 3-inch anti-aircraft guns.

Moving from 11-inch to 13.5-inch turrets would require far more than a weapon swap. Standard displacement would probably rise from roughly 7,000 tons to between 9,000 and 10,000 tons as the heavier main battery drives structural changes. A belt sized for the original 11-inch-gun ship would probably need thickening as well. The larger hull might support a twin 6-inch mount aft alongside six single 6-inch guns rather than leaving the secondary battery unchanged. A revised design would also carry more 3-inch anti-aircraft guns. The main-gun choice therefore affects armour, secondary weapons, and total displacement.