Hi. I am about to be faced with a similar situation you have with the exhaust as soon as we can get the rebuilt 235 installed in place of my old 216.
I plan to go with duals, 1 down each side but the shop doing the engine shop does not do exhaust systems. I may have to haul it to the muffler shop which is also almost 50 miles away to get it done as I do not want to drive that far with just headers.
I recently ordered a few things from Patrick's Antique Car & Truck website & they offer a stainless muffler with 2 pipes in & 2 pipes out. When this is used you run both pipes down the same side of chassis & they come out side by side at the rear. I asked about this but they were currently on backorder with that muffler.
Jimmie
