Not my pictures I just had them from the link Charles mentioned and placed them here on the site. Backs up what he originally posted in reply #2
But it's "only" pictures. It that pipe really welded? Have you Ford documentation to back up the welded muffler and pipe?
Well I do.
These Ford drawings are from "1968 Ford Car Parts" (aka MPC).
The 1975 edition shows different service methods and parts.
The second picture - Ref Text Section 52 page 10 NOTE 3 - Supplied In Muffler Assy.
Pic 1 confirms the pipe is a 2 inch diameter;
Pic 3 shows clamp part number of A9AA-5A231-B, 2 inch;
Pic 4 shows the rear pipe and muffler as a completer assembly;
Jim