Dust off your crystal ball and GUESS the horsepower !

Brooks James said
The only way my 72 /6 Gold Duster would smoke em was if I got going 20 in reverse and slammed it into drive

Did that a few times with my first car too, a 55 chevy, w/265.
But I also dropped it into R while going 35 mph in drive too (pndlr). Locks up the rear wheels FAST!