Stick w/ stock AC Delco wires.

What year/model is your car?

As far as changing the LIM gaskets its been covered on here dozens of times. Search a bit and you will find all you need to know.

Basically, find a weekend that you can kill (2 days) and some basic hand tools, a torque wrench and go to town. Even for a newb its not too hard once you have a plan in place.