Photos wanted of inside of stock 85 carrera muffler

[roadsterswap]

I picked up a used muffler for my 3.2 and was considering capping of the single outlet and making a dual pipe set up. I was thinking of going the cheap route to having a "sport" muffler. Are the internals different on the dual muffler? I know they are usually two in and two out. What happens when you just make a one in two out situation? Or should I modify the internals ? Any experiences out there? Any photos? Any advice? thanks for the help.