Modifying the Outlaw Engineering KL03 spacers to match with the KLZE IM ports:
As noted in the instructions above, the phenolic spacers can be modified to create a somewhat gradual transition between the KLZE IM ports to the KL03 head's intake ports theoretically reducing turbulance and maximizing the performance gains of your ZE IM installation.
All you need for this setup is a set of Outlaw Engineering KL03 phenolic intake manifold spacers, a rotary tool (e.g. Dremel), and a 1/4 inch barrel sander attachment for your rotary tool. I'd also recommend safety goggles and a mask of some sorts to prevent inhaling the dust and particles created when grinding the spacers.
Here are some pics and explanations:
As you can see in the following picture, the KL03 intake ports overlap a fair amount of the KLZE's IM port predominantly at the corners.
pic of KL03 spacer port overlap on the KLZE IM
You should overlay the KL03 spacer on the KLZE IM ports. Use the bolt holes to aid in alignment as seen in this pic:
spacer aligned on the ports
Then you should use your finger to feel the edges that protrude into the ZE port:
feeling for the edges
Use your rotary tool to start a couple of points where you want to grind down
initial grinding on the spacers
The continue feeling for edges that protrude into the ZE port. You should grind these down and then angle the edges down so that they gradually meet the 03 port opening side of the spacers. Eventually, you will no longer feel an edge. Rather, you will feel a smooth transition from the IM port to the phenolic spacer. Do not alter the 03 side of the spacers since they are port matched to the heads already courtesy of Outlaw engineering. Also, do not mix up the front and rear heads or sides of the spacer that you are working on. The rear bank spacer (once modified) will only match up to the corresponding rear bank. If you compare a spacer modified for the rear you will notice that it no longer port matches when you align it with the front bank on the ZE IM.
pic of finished spacer and the barrel sander used in the procedure