80 & 85 mph speed limits

Sorry, I was actually referring to the freeway rat race.

But the car is supposed to mimic a "could have been" 1972 winged Mopar NASCAR small block after the 1971 rule change that limited the Superbird and Dodge Daytona to 5.0 liters.

Owner Mario Rossi ran a Keith Black 305 in his '69 Dodge Daytona against big block hemis and big block Ford/Chevys in the first NASCAR race of 1971, the Daytona 500.
In other words, my project car is supposed to be the factory offered street version sold at dealerships, if Chrysler had followed through with their wind tunnel studies on the "fuselage" style '71 and '72 Bbodies and then actually produced vehicles available to the public to conform with new restrictive NASCAR displacement ruling. However, Chrysler decided to bail out on that program instead.