Looking for info on compression block in a Catalina 30

[Project_Mayhem]

I'm trying to calculate the amount of material I will need to replace my compression block with G10. I have height and width. Does anyone know the depth of the wood block?

Contrary to popular belief, the 94 C30 has wood in the bilge

 

[dmax]

"Contrary to popular belief, the 94 C30 has wood in the bilge"
Yes, but just under the mast, it doesn't have plywood in the keel stub.