The Hurst "Ram Rod" and "Super Shifter" for a B body both use the same "L" bracket and longer rods. This requires cutting a slot about 2" wide in the back of the tunnel. No other cutting is required but I have seen some real hack jobs. Now you have to figure what to cover all that mechanism with. Back in the day, Hurst made these just for that purpose and provided a template to match the floor lines.

NOTE: the large hole in the floor as seen in the above post is not necessary with an a833 and these shifters. Also, the original hole in the top of the tunnel is still required. In 1974 these were $80. through a speed shop. I still have a couple and have tossed around reproducing them but haven't got around to it yet.

I should mention this is a '69 B body.