Well started my service, was hoping to get it done but need to get loads of other stuff and being forced to work weekend So will need to do it bit by bit over the coming week. But leads came through today
im not really into the performance side of modding
but just a thought, couldnt you use 0 guage (or 4guage) cable from an amplifier wiring kit and make your own "custom" spark plug leads. they wud have very little resistance at all, and could possibly suit your needs perfectly.
You can buy the cable on the meter, but the difficult part is crimping the connectors on, and the quality of the cable etc. I found the same cable for £3 per meter! at local car restoration place, but I couldn't be bothered messing around and had spare cash tbh.