The stock Gen-3 L6 cam lobes for the siamese ports are:
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Is the new head the same, or will it require a billet cam?
What makes this interesting is that the Chrysler Australia "hemi" L6 motor has the same bore pitch as the Chevy (4.40"). If the valve positions for separate ports are:
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the Chrysler's Weber, etc. manifold would be an easy adaptation, they might even make the intake side match the Chrysler completely to avoid the problem entirely. But - a new cam would be $$$.
Here's a 4 bbl. Chrysler manifold
