Ya, I sell that plug at canadian tire, it's about 10-15 bucks...it plugs into your harness, and at the other end has a bunch of wires ready to be spliced..
Cut springs looks good, but the ride is a bit rough if you cut them too much..
You could half tint the rear lights, that looks good....and as for an eyelid, get a fiberglass badgeless grill, looks hella sweet...