The dry type intakes lend themsevles very well to this mod as the upper and lower runners lay in top of each other so when the holes are milled it's basically just into the correct runner (maintaining the intregitry of the dual plane design.

I don't have any of the wet type manifolds around anymore to look at but doing this modification would depend on whether the milling could be done without going into the water runners.

Although not necessarly optimum due to a bit of port mismatch, the latter 331-354-392 manifolds will also bolt to your heads. This opens up a wide varity of different intakes for your Hemi, including the latter dry style intakes that occasionally show up on E Bay and sell for very little.

Using the latter intakes of course now poses the problem of getting the heated water out of the block. You can accomplish this either by using a variation of the plumbers nightmare shown on the Drag Star manifold above, or if your real brave putting outlets in the front of the heads similar to what the latter heads have.