Just remember to drill a small hole in the back of the box to allow the speaker to move and not create a increase in cabinet pressure from the speaker movement. Different size hole will also effect sound. start small and test as you go.
I say this because I am using the stock kinghauler speaker in Susan's truck but I noticed if I lay the speaker facing straight up, the cabinet comes to the edge of the door window and you can see through them unlike with the speaker facing forward which blocks the windows.
With speaker laying on cab floor the rear hole was blocked and when cranked up it sounded like crap. I drilled a hole in the cab floor in line with the hole in the speaker and what a difference in sound! It's a little different than my truck and yet it's the same sound system!
Too bad we can't get Bose to make a system for RC's !
Mario