Spacer plate in front of leaf spring hanger

I don't know that the factory would put such a spacer there. The studs in that hanger are barely long enough to accommodate a spacer.
Those who put on larger wheels and tires discover one side side sits more forward in the well which is normal ( I forget is it right or left and I wont go look in the pouring rain ). Drag racers will add a spacer to alter this offset for a straighter launch.