The aftermarket has really responded to the need for wiring solutions. Speartech Fuel Injection Systems can either modify your factory harness or build you a custom harness to your specifications. Speartech also offers ECU programming, and if you want to run the fly-by-wire throttle body, they can hook you up there as well. FAST offers their top-of-the-line XFI computer and can provide you with the wiring to make it work. Other companies like Mast Motorsports, Holley, and Turn Key Engine offer theira own systems with simplified harness that make installation a snap. GM Performance Parts also has a wiring kit (shown) complete with computer and all the widgets to fire up their crate engines. It's sure a lot easier than it used to be.