I never figured out why Dodge put a 2 bbl on a V8. I had a 73 PU with 360 I think with a 2 bbl. I guess they thought it was more MPG. I replaced it with a 4 bbl and got better performance and better mileage. Just had to use a lighter foot.
My uncle bought a new Polara coupe (383) when I was in HS, 65 maybe. My cousin and I took it out for a spin. There wasn't anything in my neighborhood that quick.