1.6 sounds a lot like 60 foot times for a very quick drag car.
For comparison, my 440 powered, 3020lb Duster on 13" x 31" slicks would post right at 2.0 60 foot times.
That was with zero tire spin off the line, 8" converter flashin to 4700 rpm thru 4.89 gears.
There weren't many cars with license plates that could stay with it in first gear.
There *was* a small block powered '69 Camaro useda leave quicker on me during time trials..
..he was runnin 5.38's in the back, same size slicks, same weight, about a second faster thru the 1/4.
Was a trailer car ..no license plates, etc. Was a sweet soundin 8k rpm motor

-Frank aka GE