I've never had trouble with my MSD 8.5mm wires (BBC 402) but I thinik they only come black or red. I see alot of folks running Taylor wires with MSD and they have many colors available. You'll want at least 8mm wires for that MSD ignition (spring for the bigger 8.5mm ones)

You want to make sure it's a helically wound core wire for HEI/MSD not a solid core wire.

-Chris