This is for your 1970 Mach 1 Mustang 351 Cleveland 4V I'm guessing
The MPCs show the service replacement pipes and layout. They can differ from assembly line parts or be very similar. As mentioned the Assembly manuals show some of the applications
The H pipe is a series of three pipes welded together (70 San Jose M code Mach I)
Close-up of connection and index notch
Below are some examples from 70 Boss 302 which would be similar to your application - except for the back end of the pipes (tips)
The H pipe attaches to (with two clamps) to the intermediate pipes with mufflers (welded to one another by the supplier), One passenger and one drivers side pipe and muffler combinations
Back surface of the muffler is welded to the tail pipes. They differ depending on the application.
Muffler hanger example (70 San Jose M code Mach I)
Rear Mount and clamp (both sides) with gas tank behind (70 San Jose M code Mach I)
Different view of the clamp style and hardware
View of the passenger side (70 San Jose M code Mach I)
From there you have the shinny exhaust tips that are added to the ends that extend through your rear valance
What apparently I don't have or can't find at the moment is a picture of the hardware, location and how the tips were attached to the tail pipe- Sorry but hope this helps
