My opinion of the guns is the forward section of the gun, mount behind the spring and everything forward, are over sized. As far as 3 goes, the dashboards were cut down when reengined. That's where the air cleaner was mounted, so if you do an early model it's fine sort of. On the most halftracks with a .30cal mounted in the visor, there was a cutout where the glove box is for 3 or 4 ammo cans. 7, yes it should have the rear door. 8, yes the tail lights should be mounted at the top. 9, yes that style of head lights were only used on the upgraded halftracks.