The practical reasons for a ccw crank are better stock block life, and ultimate life of the crank. Also helping reduce or eliminate cap walk in my Megablock. Most racers won't really need one. But the advantages are there or Ford wouldn't use them in all 11 to 19 year 5.0 Mustang motors. Also as i said earlier , they sell that stock crank as thier performance part, zero failures. Some of those race turbo motors i assume are putting out some serious hp!