Intake manifold options for a Magnum 5.9/360

This car I have is not a drag racer.

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I only have the deep gear because I like driving it off road on trails sliding around like them Duke boys did. Driving a V8 RWD car off road is a blast....I don't want a setup that only runs hard at higher rpms.
Wish I had unlimited access to old rust free cool cars like this one! It’s intended use in your ownership Sounds like A lot of fun