Simple question for you all. Since it's possible to use a 650 cam in a 550 is it possible to deck the 550 head. If so by how much? There may be clearance issues if I'm not mistaken. I figure if I take the 550 head to the shop for clean-up why not get a little taken off the bottom. If you all advise against it then it's probably for good reason. Thanks for any advise.