We offer ported factory iron heads a la C8VE, C9VE D0VE & D3VE.
If you wish to port yourself, then I strongly recommend that you research heavily. The factory 429/460 exhaust port requires lots of attention, but exactly what
you grind on/how you recontour the port may be very different than what you may think.
There is more than one way to skin a cat and thus there are different porting techniques. Ideally, each motor build should have porting that is done specifcally for that build.
If you insist
on porting yourself and wish to study one way to port heads, then I suggest paying the subscription fee in order to gain access to the following site about head proting:
Re-In-"Car"-nation High Performance and Automotive Repair/index
Be prepared to spend some good money on quality porting tools, including a very big compressor, 3/8" hose, a quality die grinder and a wide, wide
section of various carbide cutting bits, grinding stones and sanding barrels. (each of which have their place in a fully modified/refined port). All the proper bits by themselves will cost a few hundred. Finally, have a spare (damaged/throw away) head that you can practice on, because it takes lots of experience and knowing where you may hit a water jacket, etc.
Or for about the same amount of money, you can leave it to a professional.