What is this hose to?

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  • Fuelline1 copy.jpg
    Fuelline1 copy.jpg
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gray thingamabob is a check valve, one side goes to the brake booster (assists with braking) other side goes to the intake manifold to pick up a vacuum.
Does it go to the L shaped thingy ma bob on the back of the intake

:), For some reason I thought I knew this, such a newbie question for doing a motor swap