If I grind the valve guide bosses down on both the intake and exhaust, and let about a 1/4" of the guide stick out, will this cause any problems on a daily driver? On the Exh. side im going to make the roof of the runner a straight line shot all the way out, and then install the guide, so the guide will then be more exposed on one side than another. On the Int. side im going to shape the valve guide boss into a tear drop, and mill the top of the boss off 1/4". I will then install the guide so that 1/4" is exposed. The cam im going to use has a lift of 512, and im going to use roller rockers as well. Will this be ok for a daily driver or will it cause problems? Will the extrusion of the guides imped the flow?