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Factory Five Racing Roadster Wiring Firewall

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The firewall on the Mk III has a large oval opening for the stock EFI wiring from a donor Mustang. For those using a carburetor, FFR supplies a block-off plate. Since our Mass-Flo EFI wiring needs to mate up with the sensors on the engine, we decided to use this hole.
Factory Five Roadster Wiring Install - Project Snake Charmer Part: 11

 The firewall on the Mk III has a large oval opening for the stock EFI wiring from a donor Mustang. For those using a carburetor, FFR supplies a block-off plate. Since our Mass-Flo EFI wiring needs to mate up with the sensors on the engine, we decided to use this hole.  View Related Article

 

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