dryfitting means fitting the parts before glue and before paint , making sure tey fot together , often you need to sand some stuff first to make it fit right , sometimes it just fits horrible .. then you first make it fit and testfit and sand and testfit untill you are sure it will fit on final assembly .. also take in consideration the thickness of primer and paint ... now going from the pictures you def. need to try and take out the grille and bumper and they need to be put in much higher , they need to sit inside the room between the front fenders way higher , the sides of the front bumper will fall in front os the recesses in the fenders .. why the hood dont closes i dont know could be the hinges or something of the engine being too high ? dryfitting ? lets say you have the sanded body and hood , then you should have put the hood on , make sure it sits flush and also sand along the front lines so its levels with the fenders , always assume a kit wont fit perfect , some revell kits like the 32 fords are pretty well fitting but almost always you need to shave of a mm here and there