They sell the entire kit without the head unit. Go to www.modularpowerhouse.com and check out their mongoose kits. You'll need everything there. Piping, injectors, spark plugs, fuel pump, IAT sensor, filter, bigger MAF with adapter, oil feed and return lines, pulleys, bolts, spacers, and bracket.
I'd recommend my first option because unless you buy a used kit, no way you'll get all the right bolts, spacers, and pulleys.