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The '48 - '52 cowl vents' linkages are quite a bit different than that pic. I don't have a good diagram of them. If you are asking about the bolt that is spring loaded and allows you to set the vent in partially-open position, this is a drawing of that.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
