The predator comes with a plug for the addition of a kill switch, if your not using a polaris unit then cut the plug off. Thats what I done. I'm running a pro design kill switch. The shorter of the two wires goes to a ground and the longer goes to the ignition. If your unsure about which wire is which then look in a service manuel or check with your dealer they should be able to tell you. I would, but I don't have my manuel with me.

As for front rims I'm running a set of ITP T-9 series rims with a reverse offset. It will be harder on your ball joints, but at the time nobody was making extended arms yet and this was the only other alternative. It works pretty well and even if you go through a set of ball joints a year its still alot cheaper then $800 for a set of extended arms.

Buy a set of Rath MX hubs they will widen the rear 3"s. They are light weight and very strong and a whole lot cheaper then an entire axle.