Name is Six t nut (60 nut). I've owned and restored over 15 1960 Chevys.
Not a lot, but they were nice cars and 3 parts cars.
The Red Impala is a 348 3 deuce, automatic (pg, p/s, p/b, factory air).
The Gray Impala is 348, p/s, p/b, pg, padded dash, power windows, 6 way power seat, factory a/c...