Harrison I built with my brother weighs 980kgs on the road with all fluids. It runs Lexus 4lt, Tremec TR3550 and Skyline R32 GTR rear.
Didn't go to any trouble to make it lighter than usual, although it will be lighter than most as it doesn't have all bolt on shiney bits, paint and a complete interior.
AWD Harrison's will come when OZVenom gets around to it. Although they won't have 6cyl.
And with OZVenom they won't be normally aspirated either.