Hook in the Hull ??

[schooner]

Have a 1984 Sceptre and am trying to fix some handling / performance problems. Recently repowered with 4 stroke Suzuki. As I was dialing in the correct prop, noticed the need for more bow rise, even with the heavier motor. After looking at all possibilities, mechanic suggested I might have a "hook" in the hull in which a sagging transom acts like a permanent trim tab. Thought this would be evident in broken stringers, etc but no sign of that. Anyone heard of this in SeaCrafts?