I swapped a 91 box into my 65. It bolts to the frame no problem. I installed the link easy. The issue is the steering column and hoses. You can order hoses or fab your own. I got the column from the donor car. You may be able to swap parts from one box to the other. You also need to match the pressure valve on the steering pump to the box.
http://www.popularhotrodding.com/tech/0512phr_1976_chevrolet_camaro_steering _box_install/index.html This is what you are up against.
