That's a mighty big and expensive change you're thinkin about when there could still be some left in the tune. Can you get specific with your tune? We might can help more. Now if you just WANT aluminum heads, then that's a different matter altogether.
i replied to fishmens67 with the main stuff i've done with tuning. watched and read a lot of things about what i need to look out for especially with a cam like this but im sure there's tons of little things ive looked over as far as tuning