road race engine...

rmchrgr said

Also, the 5.2 is generally a hydraulic roller cam so the RPMs are going to be pretty limited with that setup.

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I’d fix that with a solid roller cam and upgrade the valve train where I could on a Magnum engine. An Edelbrock Magnum head, the EQ or the new Trick Flow heads would be the upgraded air flow solution.

This would be the best route with a Magnum engine on the cheap IMO. Shy of a rebuild (w/higher compression pistons) or stroking the engine.