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Message: [QUOTE="ITUKMOR, post: 11875, member: 475"] the real worry on a 7.3L head is that removing too much material can get into areas of more porous metal. the swirling is not really that important as the application is forced induction and the fuel is injected directly into the cylinder. but if you do get into this "less dense" material it can allow moisture to seep through into the intake and exhaust runners. the valve guide area can cause shrouding due to the sharp edges and overhang. port size is important and I would recommend measuring them as you go until you have done a few. for tooling, several size and shaped carbide burrs seem to work the best with various sand rolls to smooth it all out. sanding stones did not work very good at all. another suggestion is to do all the intake ports at one time and the same with the exhaust. this way you kinda get a feel for what it looks like visually. this way you can get them all close and then measure them for the final touches. remember to go slow and check your work often. once you take off too much you can never put it back. happy porting!! [/QUOTE]

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