Brant: I have an undercarriage pic of 5F07K261914, which should have been early enough to have the transverse system. The pic shows the brake hose bracket off to the side, not near the tunnel like yours. It also shows a normal dual exhaust rear brake hose. The car has had some restoration work on it, so can't say with 100% certainty that this is the original configuration.
Hard to tell in your pic, but are there 2 indents where the bracket would be typically located on the unibody? They are usually perpendicular to each other, used as a locating spot for the bracket.