Tue Jul 23, 2019 4:30 pm by nikkinutshop
Muffler location is better in some positions than others. In the 1960s, GM found that moving the muffler, as far back as is practical, to the rearmost position improved engine performance. These old IHC engines are so far out of the "performance" arena, location will not make any difference. I like to install the muffler under the box then bring the exhaust pipe over the axle and out behind the right fender.
There is a low pressure area behind the truck because of the flat-back cab and the tailgate. This tends to collect exhaust and drag it along with the truck. When forward motion stops, the exhaust will waft forward over the truck and may cause bad smell for the occupants.
The end of the tail-pipe should be turned down and toward the rear so the acidic exhaust will not contact the fender and cause premature corrosion. Almost every Jeep Cherokee of the 1990s corroded away from poor exhaust placement at the right rear area.
I have used and like the sound of a Flow Master muffler. These old IHC motors have a very pleasant exhaust note.
Do not reuse old exhaust parts. They will fail sooner and the installation will have to be done again.
I would rather have tools I do not need than to need tools I do not have