Here are a few pictures of the frame connectors I made. I got the idea from some guys over on an E-body site I'm on. This style connecter will still allow the brake and fuel lines to be installed as one piece. The connectors that weld to the floor pan won't allow that. These are made from 1/8" thick 1x2 rectangular tubing. Holes were drilled though every 6" or so and 1/8" thick round tubing welded inside. This gives the rectangular tubing a lot more strength. I cut holes in the frame so the tubing can be inserted inside.