I think you need to reread what was posted, they charge to open up the chamber, they do not come that way. And I would not call it porting, blending in the 202 intake valve
To the bowl, that needs to be done after cutting it to the 202 size. It also comes in LA or Mag version, run the LA and use you existing rockers. And if the OP is running the 268 cam, stock J heads will work just fine also as well as the EQ's. i would run a different cam with a new set of close chamber heads my self. But it's easy to spend other people's $