Looking at that bar, the back of that has been cut down to clear an exhaust header. The bent sheet metal should have "fins" going down the rear of the bar.. where you can see the ground back welds. So it sits with a cutout for the bar then welds front and back .. Like this from above.. As you can see with a 4 into 1 header, not much room. By the way, mine reads about 580-590mm from right hand end to centre boss under the oil pump.. This shows the type 1 rear engine bar mounts that go in there too.