I installed the Jim Carter muffler on my COE. It has the straight through passage with baffles, like the OEM one. The local muffler guy that I used to do my system thought it would be too loud, but it wasn't. Using it allowed me to use the stock bracket. In short, I am happy with it.
Kent

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix