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The father and son pair had to install a Walbro fuel pump, because the mechanical pump didn’t maintain enough pressure. Under boost, fuel was pushed backward in the fuel lines. They then converted a naturally aspirated Holley fuel-pressure regulator to reference boost and added a return line to the gas tank. Other than the Offenhauser intake manifold, the engine is a completely stock 7.8:1 compression Slant Six. David says the stock cam works perfect for turbocharging because it’s so small, and Josh says the car now makes huge torque. It’s taken apart in these pictures because Josh broke some teeth off the timing gear while doing CC-approved burnouts in front of some hot chicks in Huntington Beach, California. We will do an in-depth car feature on Josh’s Duster when it’s back together.