Here's the original cable form my 71 340 Cuda SPD 3/31/71. I can't confirm that it was green but I can't deny it wasn't. If you look the coloring on the ferrule on the cable is a different hue than on the sheath.
One thing I've notice looking at the NOS cables I have is that the ferrule was painted seperatley before it was crimped onto the the cable.
