MPH is horsepower, ET is hook. I was doing that in 1991-1992 with non adjustable shocks, an outdated clutch and a cam that Brookshire shoved up my butt that was probably 30 HP down on average.
My 422 with a solid lifter cam, ported 360-1 heads, and 4.88 gears, and a 850 carb ran out of guts around 900 feet and ran 9.38@138mph. This engine pulls so much harder than that engine did. Both ran exactly the same (5.98) in the 1/8.