Wood used in hull construction?

[PrplGld]

I have a 1999 Regal 1700 LSR and I'd like to know how much wood was used in hull construction. I'm in the process of removing/repairing the MerCruiser gimbal housing, so I can see the transom is mostly wood. But how about the rest of the boat? Anyone have any info or related construction images?

I don't see any indication of stringers in the bilge area directly below the engine. I currently have the engine pulled and I'd like to install a small transducer.