1967 Dodge Dart 273 question factory single exhaust/

Was the factory exhaust the HiPo version with the Large 2.5 in headpipe, straight through muffler, larger 2.25 over-the-axle pipe and straight through resonator. Anything else won’t sound the same.
It was, I wasn’t impressed but in its defense it was 50 years old. Sounds like a muscle car with the duals, no crossover.