Actually, facing downwind (tail into the wind) is the best position for engine cooling on the ground. This effect can be clearly seen on engine analysers that show the CHT for every cylinder.
With a tailwind the propeller (at idle or low power) has a greater angle of attack than the same prop in headwind conditions where it could be 'freewheeling' with no added cooling effect.
Worst position is crosswind.
No need for long ground runups at high power in my opinion.