I got a 1957 Ford Fairlane 500 with a Thunderbird 312 engine. My question is did they come from the factory with dual exhaust?
Yes, the 272 and 292 engines were 2 barrel, single exhaust equipped, but all the 312s had a least a 4 barrel carb, and dual exhaust.
And the 1957 Ford Custom State Police cars came with dual exhaust and front seat belts.