As you'll be able to tell, I've never built a boat before and have no clue where to begin. I recently came across the fiberglass "shell" of a 17' tunnel hull and figured it would be a good place to start. I picked it up for $250 and now not sure what's next. It is only the top and bottom halves rivited together. Still needs to be sealed and strenghthened. I was told it would handle anything up to 175 hp outboard. I was thinking more along the lines of a 140. Either way, I'm not sure how to make it rigid (the right way). I'm afraid to step inside it to clean it out because there is so much flex in it. Any help would be greatly appreciated. Thanks is advance!!