66 Cuda Neutral safety switch
negative, that number does not show in the part cat's for the years 1964 through 1973.
I just looked at the one we took off of the 68 'cuda (leaking) it was marked on the flange 457 and when I dropped the crush washer back it also has 2770660 on it. So with that said 3004087 will work I never looked at the part numbers but the part.
I know the early 55?-64 single switches were all metal in the middle. The 65-8 were plastic around a metal pin. So we just went with it.