Thanks, that makes a lot of sense.To try an better clarify what the plates are used for I will add some comments.
When you upgrade to the 3L and use the 3L heads you have to port match the intake runners to the Contour LIM (for a ported 3L). Originally people were doing this porting using a sharpie and trying to trace the LIM onto the head. I tried this and found it very hard and the trace marks would rub off - making me trace again. It was also very hard to make sure the shape was in the correct location - trying to trace down the neck of the LIM.
I originally designed the plate to aid in this process, and it cut the time of porting down substantially. The first head took me about 4 or 5 hours while the second head took 1.5 or so.
The second issue that requires you to use the plates as a gasket so to speak is the 3L injector port. The 3L injector is centered in the intake runner while the contour injector is to one side. If you just throw the LIM with the stock gasket on it leaves an openning where the injector should have been. In the past people corrected this using JB weld or aluminum MIG welding. Welding is hard and can cause head warping if not done carefully. I tried the JB weld and had some success on the first head but did not like the idea of having JB weld in the intake runner.
With my plates you can still use the Contour LIM gasket, but the injector port is now covered.
Hope that helps - let me know if you have any questions.
Paul
Has anyone tried the aluminum filler from Loctite in place of JBWeld?
~Mike~