I know that this is a typicall question with a lot of variables. But how much cam can you run with tuning and the stock ecm 7747. I am going to be swapping out my comp XE256 for a set of new heads and a CompXFI268. Now I am just wondering what the idle is going to be like to tune. I know that there will be a new VE graph with different range and I will need some more injector but has anyone run this cam??