Ford vs Chevy Build-up

[HandOverFist]

Originally Posted by black88coupe

Pull off the upholstery and make up/ weld a bracket to protrude through the back of the seat that will allow it to bolt to the bar?

There is very little to no metal in the seats to bolt to. Even in a '67 Camaro the seat back is merely some thin stamped vinyl covered metal attached to the back with one clip up top and two upholstery screws at the bottom. It would be a useless exercise for little gain in my opinion.