There isn't a 1 formula fit's all Hemi builds or any other type of engine. Intended use and all variables involved will determine what cam or even type of cam to be best for combo, Ex you wouldn't get great results in a 318 with 106 cam 238 degree with 3.23 gears, even if the formula says so. or better yet Customers build an engine with healthy components and then go put a .50 6 speed overdrive and tell me the car bucks at 60mph. Really???? reving 1700 with a 246 cam. So the short answer is choose a cam accordingly to everything in your car. Like baking a cake , it's an entire recipe