Story of the Black Ghost.

Brooks James said
Saw this yrs ago, if IIRC, it was stock, 70 model.
Motor Trend Tested one @14.0,
70 LS6 Chevelle 13.8.
70 Buick GSX Stage Il, @13.2
I find it hard to believe that it blew everything else away.
Such is the stuff If legends.......

Were all three tests by Motor Trend?

Motor Trend was very 'conservative', as far I know - they don't touch/optimize anything on the car and had always two adults on board...