Easy? bowl blend yes, SSR well, if you say so. Personally, i would never recommend it to a beginner. To answer you question. because the man that designed the head was Performance minded.............the man the made the final design on the casting was Cost minded. I can just here the argument. "Performance: YOU CHANGED MY DESIGN AND DESTROYED THE HEAD! Cost: At .420 lift it don't flow any different and it cost less to make. Performance: YOU LOST 20 CFM!!!! Cost: like i said, didn't change a thing. And i will be the one that gets a bonus for saving the company money. Corporate: nothing wrong with the engine SHIP!