[Peanut74]

As far as bracing I put a brace from door to door on the front and back to hold the door jambs from moving in or out. Then cross brace driver front to pass rear and vise versa and finally front to rear jamb on each door opening. That should lock everything in place and hold it there. One thing to remember is that back in the 60's the door fit up was not that great so gaps were all over the place.