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One additional change was required before we could run the cams, and that had to do with the engine management system. The Mopar Performance controller is not readily programmable for the serious modifications we had in mind. We needed full control over the fuel and spark curves, as well as a much higher rev limit to really get the most of our new cams. Westech's fuel injection guru Tom Habrzyk, wired the Hemi with components from FAST.