Choosing cam for 5.9 magnum

I ended up buying a Hughes cam.... I went the the biggest cam that will work with the Hughes EQ heads. It's a .539/.549 lift. 218/222 duration. I've talked to a few people and looked at a few builds on the internet. Seems that a 10.7:1 can live on pump gas if the tune is right and the quench is good. I have all of the parts here in hand and the pistons were free. So I'll give it a shot and see if I can make it work. If not, I suppose I can pull the engine (again) and swap the pistons for some lower compression pieces. I was looking at the KB232 pistons and that would put my static and dynamic compression within reason.