Next, we turned our attention to the tie plate under the floors at the very rear. Usually, we simply weld in a piece of the strcutural hidden subframe tubing here – it is stronger, simpler, and gives a little more clearance for the exhaust. In this case, we wanted to keep the shell original from underneath, and we had not placed the tubes inside the rear lower bulkhead anyway, so we decided to just put in the factory piece…