I was intending on putting a stack on it and get rid of all the pipes/muffler/converter/etc. Its all about ready to fall off the truck anyway. Damn Illinois road potholes! Dodge one and hit 4 other ones in the process! Hard on trucks!
Anyway I want a 3" straight pipe up the side of the cab on the pass. side --- no muffler/converter ,--- and a turn out on it facing 45 degree angle to the rear.
Main problem right now is the cost of the 3" pipe, ---- expensive size!

I had twin 2" on my old 64 GMC half ton with a hi-perf 283 in it. Ran it for 12 years before salt ate the cab up! I used 2" pipes from a kids swing set for the stacks on it.

"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands."