Welcome, I am fairly new too. This is a great site. That is strange. The bars are still under the car hanging from the body? I had a 1967 parts car, 400 HO, 3 speed manual trans, 3:55 rear gears, and it had the traction bars on both sides. AFAIK even the 6 cylinder cars had the pass side traction bar. Does the axle look like it had the brackets cut off? Or maybe the carrier and gears were swapped into a different axle at some point? Strange things happen over the years. I purchased a complete set of bars from a guy in Connecticut, all the parts had been removed from the axle. They are pretty desirable. I think if you scrounge around a bit you may find the axle brackets on Fleabay or somewhere. The axle brackets are ambidextrous, but the body brackets are specific for each side. HARD to find those. It would definitely be worth restoring that. Take it from me, the mono leafs will experience wrap-up under the 400's torque.