The road test I mentioned is from the book 'Plymouth Barracuda 1964-74' by Brooklands Books/Motorbooks Int. In it are a bunch of tests of Barracudas from back in the day.

The '69 'Cuda 440 test article is my favorite.

Anyway, the article is from 'Road Test' - June 1970.
Best time of 383 with automatic was 14.4/98.97mph.

Best time by same mag in Feb '70 for a 340 'Cuda is 15.3.

Carlife got a 340 'Cuda to do 15.0/94mph in same month.

Car and Driver got an AAR to do 14.3/99.5mph in July of '70.