Bent frames?

The bow has bent down several inches over the years, and the keel has a significant bulge in the engine area. Either the weight of the bow and improper storage or the weight of the engine over the frames is the probable cause. After the I removed the keel, some cement blocks did the trick. Blocking with the correct thickness between the floor and sheer line.

The boat was assembled from pre-cut parts back in the days, and frames was supposed to be assembled tight. I guess 1/4" - 3/8" gap was close enough. I also think the half-round holes was drilled after frame was assembled and bolted in. They have different placement and size from frame to frame. This one is is also drilled at an angle.

I'm also waiting for the profile drawing of the hull from the Mariners Museum. I hope this will tell me if and how much concave shape the frames have, especially the aft 3 or 4 on the planning surface. Can't seem to get it to look right with battens and straightedges.