[Security guy]

I've got the same problem with my hood.. It's been a while, but I think of you loosen the hinge bolts and have someone put pressure up on the hood, then re-tighten the hinge bolts, it will close a lot better.. I think... I just haven't had time to mess with mine..
Another thing to check (for your door gap) is the mounting bushings for your radiator cradle and cab bushings.. If they are worn bad, it may cause the cab or front end to be tweaked on the frame.. check all your mounting points..