Mike I don’t think the original latches look that bad for the clam shell as a locking device Allan used them on his GTR build
Mike one thing to remember is put your rear alum under car air spoiler in a position you like and then start building your exhaust the mufflers tend to take up some room
Mike did you trail fit the under frame air diffuser I would because it looks like your two elbows may be in the way of the diffuser sitting in the Right position just a thought