Q: 350 will not run

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Stock 350, freshly rebuilt Rochester 4bbl, new points ignition from dizzy to the plugs, new timing chain and verified TDC marks on crank and cam

Ignition timing set to 0* tdc. Good compression on all cylinders.

Fuel pressure regulator installed and set to 5 psi.

When I try to start it, must hold throttle to the floor and only then will it fire for 1 second, sputter, die, and shoot gas out of the vent on top of the carb that's above the metering rods.

Any help would be amazing

My car has 111111 miles.
My car has a manual transmission.

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