4.8 cam with lope help

I have looked around and no one seems to have an rough general idea.
I have an 03 Tahoe with 4.8 and long tubes and full exhaust.
I want the nastiest lopiest(new word lol) cam that does not require a new torque converter. It would be nice to suggest what springs/rods I would need with it also. I appreciate any help.

Since I'm back(it's been a long time) which is the best tuner nowadays that can dial me in after the swap

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