lal Naja I have been burned on car with driviblity issues from poor contections, weak ground wires to frames and motors, having false signals because of some wires need to be twisted to stop em from effecting by their EM signals on other curcuits. In the old instructions from MSD I got and running the E, HVC coil there was a note about adding a good ground to one of the 4 bolts. I have learned that have 3-4 grounds fixed many problems I had with starters, Alt's, and batterys. Aluminum motors also have more resistance that steel or iron. If you look at some of the newer cars and truck, we are running 3-4 grounds to motors alone, 2-3 from neg cable of battery to chassic and motor, and the ECU's have 3-5 locations of grounds. In the good old days, 2 wires where enough. Today with weird metals and cheaper built wiring systems and smaller cables you need this. This is just my opinion. Run what makes you happy. Over time all bolt hole corroide. This is not the correct word but close and resistance gets higher. New terms are Voltage drops, and load ampage tests because of small wiring now in cars. It saves weight and money. You should see the .064" connectors, 24 gauge wire, and connectors from Japan, WHOLE LOT of fun.
Rick L.