He's saying he did not use lumps on his divided port head. He left the bolt bosses intact and added the divider behind and in front of the boss. The bolt boss is going to be a much larger obstruction in the port than a lump will be, so from what he is saying, the lump may be fine "as is" for your projected power level. However, after you drive 400 HP around for a couple of weeks its going to feel like a golf cart and your going to want more. So plan ahead, instead of for the here and now.
