The Ef/L head will bolt straight on. The cam will probably run ok with the CFI, but if not, you can just run the EA cam in it.
However, I would not advise you to do this with a CFI setup.
The reason for this is because the EF/L head will reduce your engines compression (on 3.9 bottom end). Also, the EF/L head (and cam) is designed for better high RPM performance, relying on the dual runner manifold to help it out at low rpm.
The CFI setup is not is known not to have high revving ability, so by installing the EF head, you will most likely see a drop in low-mid range torque, with minimal high end improvements if any.
If I were in your position, and wanted to keep the cfi setup, I would have a EA head recoed, decked, and the exhaust ports cleaned up a little, but thats about it.
On the other hand, a MPI converion will see a 19kW increase, with the same fuel consumption.
Just my 2c on the topic.
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