I'm not sure on that body style if the 2x2 connectors will fit without cutting the floor If they will anything is better than nothing If you do decide to make and use some cut the front edge of the rear sub frames so you can slide the connector into them several inches and weld them into the rear sub frames
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
If they will anything is better than nothing 
If you do decide to make and use some cut the front edge of the rear sub frames so you can slide the connector into them several inches and weld them into the rear sub frames 