T-bar cars can be very flexible. I don't blame you one bit for tying the rails together. 77's used to spit the driver side tops on the ground from body flex. Surely that's why they redesigned the whole t-bar. I was looking at a similar idea to the photo over the weekend. But with 2x2 Over the rear floor pan and right inside the rear rails. Rear passengers will just have to deal with it. Cmon, it's only about like having a water bottle on the floor back there. I'm figuring along with cutting the rear section of my front floor out for them to pass forward on the same plane, that it will provide access to cut my trans crossmember out. Fold the cuts for weld tabs internally, and shove that tubing right up inside my front rails too. I picked up an old but low miles MP 360/380hp iron head crate engine and want to put that to the wheels instead of twisting the chassis.