That's odd.
Not only because it seems you have an intermediate pipe for a 138" WB truck (43782), but because it looks like the intermediate pipe is direct to the tailpipe going over the axle.
The Walker diagram shows a hanger tab on the back of the muffler (black square)
right about where that frame bracket is.Otherwise it only shows three clamps and a tailpipe hanger (35460)
aft of the axle. (the other black square)
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.