Im not going to tell you to not port your own heads,,,
I wont do any porting for a few reasons
I want to know the flow numbers so I need a flow bench:\without a flow bench how do I know that I have similar flow in all my ports?:
If it takes 25 hours to port a set of heads? I know that I can make more money doing something else than I can save.
I work with engines that make more than 350 horse power and the castings cost quite a lot more than I want to risk ruining:::