39cub

Jim,

Many thanks! Black is easy, so back to black I go!

Chuck

Giulia Sprint GT owner's manual #978 dated 9/64 (1st edition) and #978 R4 (4th revision) dated 3/68 both indicate that the coil to distributor wire is black in color and sized at 1.0mm2.
If you'd like a color wiring diagram for your GT, please send send me your email address and I'll send it to you.