Looking to upgrade engine ground wire

[add|ct]

Here's a picture of my 'current' ground for the engine on the bottom right of the picture linked here:

http://yfrog.com/cc1003236tj



I bought some 4/0 gauge wire today(aluminum) from a local car audio shop. I have about a foot of wire to work with which is almost double the length of the current engine ground.

I may use the current one in the same location as I've seen TomO use two engine grounds(it appears) in the picture he linked in another thread here:



I could use it from the valve cover instead of the piece mine is connected to currently.

For the connectors, I purchased some copper 4-6 gauge "battery terminal" connectors, as I couldn't find a regular copper to crimp a 4 gauge wire(I did see a 2 gauge copper at O'Reilly but was concerned about crimping problems, as in a tight crimp). There is a warning on the battery terminal connectors about them containing lead!? I'd imagine that wouldn't affect the grounding capabilities, though, right?

I'm also curious if going from an aluminum wire to a copper type of connector has any drawbacks or should I run back to the car audio shop to get their aluminum connectors? Not sure about which is best for grounding in what I'm trying to do, but I figured the connectors being copper would hold up better to corrosion and could take a cleaning easier. This new wire looks like the size guage of the ground for the tranny.

Am I on the right track guys?