Allows for a carbureted engine to be converted to EFI with a simple "bolt on" conversion.
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Fits standard small and large 1 barrel patterns.
Uses the standard GM 1bbl throttle body.
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Allows the standard GM throttle body to bolt on to a Holley 2 barrel manifold.
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For the large and small GM throttle body to fit the square bore and spread bore manifolds.
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Allows a 2 barrel throttle body to be installed on the small or large 1 barrel manifold.
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