When I had my pump out for a replacement I noticed that the bolt holes in the transom "box" had some cracks in them, what looked like someone had REALLY cranked down hard on the bolts and just smashed the crap out of the fiberglass itself. My question is whats the best way to fix this situation and the strongest. I was thinking about grinding out the cracked bolt hole areas and then laying up some fiberglass mat and cloth for strength. Then redrill the bolt holes to fit (right now they're kind of big compared to the bolt size) and use a plate or large washers to make the clamping surface area larger. When I was idling around there was a small weep but once the boat started moving that area was pressurized and it was a pretty substantial leak.
From JBP's site it looks like this person made a huge plate out of aluminum to make the entire box a mounting surface.