I think he fed you a line. Plugging in a maximum rpm of 5000, 3.08 final drive ratio and lets say 26" tires, you'd be hard pressed to break 130 miles per hour according to this potential speed calculator
and I still have a hard time believing that a 1965 anything could hit that speed anywhere other than very briefly at a dragstrip without some serious aerodynamic improvements.
Don't feel bad, I had a guy in a Supra point at his AC compressor and tell me it was a turbo. We're talking about a car that popularized by Vin Diesel and Hulk Hogan, kinda scraping the bottom of the bucket