even my stock 318 with headers and dual exhaust has a deep tone that is all Mopar distinction. my 360 with 484/280 with open headers almost sounds like a big block . my neighbor came over one day and asked me if that thing had a 440 LOL
Back in the day I owned a 1974 Roadrunner with a 318 in it (they did come from the factory with duals at least) and a lot of people asked if it had a big block in it.