1:2:Don't start an extensive porting exercise until you have completed some simpler projects.
3:Don't start your intended porting job unless you are prepared to see it through to the end.
4:Don't worry about a shine on the finished surfaces.
5:Don't, under any circumstances, start without appropriate tools, cutters, die grinders and some old valves for seat protection.
6:Don't overlook budgeting for a valve seat job and possibly head/manifold milling.
7:Don't ignore loose valve guide fits as this costs more power than you might at first suspect.
8:Don't skip safety measures such as a mask and glasses.
9:Don't port in the same space used to assemble engines.
10:Don't sweat not having a flow bench - yet!