64 Barracuda pace car?

69 Sleeper Bee said
Pace speed at Daytona & Talladega is around 75-80 mph. I think you have to be going a minimum of 75 to stay up on the banking.

But what was the banking in 1964? If the average race speed was 151 MPH?

Trying to find information on renovation dates. 1978 comes up but nothing specific