85? 23? CC Rebuild... Another water issue

[Stickalip]

First rebuild is like a polar plunge, you just gotta to jump right in.
Some of you may remember this SC, it had twins yammy 130s Previous owner stated it was not a project boat? in his ad. Although Ive owned boats I didnt know what I was in for buying an almost 35 yr ole.

One concern was water in the bilge which he said normal and all boats have it, mind you Ive always trailered my boats. This water in the bilge is worrisome. If Imdrifting especially in any chop, water coming in and since Ive read a lot on wet foam etc. and I had water leaking from stringer delamination so I thought it was time to rebuild. After removing deck and opening stringers I didnt find saturated foam like some mention, there was some but minimal. I did find a lot of voids where there was no foam. I have to discovered sitting water between stringers and hull but not that much. I am deep into it so finding a possible crack or something would be great....any thoughts? I know there is a similar thread going but if Im not mistaken, its different style hull.
Also, I assume this cone was used to secure stringer in the build process? I also see this piece of glassed plywood which is cracked, is this used for structure purpose?

Last summer on a hot day I pulled the boat in the driveway and filled it up with a good amount of water(my driveway has good pitch, 20 degrees Im guessing ), then backed it up the driveway, waited and checked for leaks and could not find one. On the water the first hour or so the bilge is dry but as the day goes she starts filling up.

Thx! any help would greatly appreciated

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