what's the best plug wire size to use with a totally stock 5.0 HO and an MSD 6a box?
I've always used the 8mm MSD wires, but need to replace and have always wondered what a bigger or smaller wire would do
For stock application 8 is fine. The biggest thing is to not have a solid core wire with an MSD. Also a helically or spiral wound will keep EMI down. Also do not wrap or bundle the wires together, keep them separate.