67 Barracuda spare tire well

67 has a single strap under the fuel tank routed left to right. That strap does complicate installation of dual exhaust. Not to say duals cant be run around it, just F.Y.I. The single strap wasn't the best way to secure the tank so from 68 up there are 2 straps routed front to back. Why does this matter ? The attach points for those straps are incorporated into the same part that was placed in the trunk floor to secure the spare tire. The other ends of these straps are dropped into 'T' shaped slots added to the rear cross member where shocks are attached. 67 has same 'T' shaped slot in left rear frame rail for pattern/example.