Try this:

1. When engine is cold: press down on gas pedal to the floor and let off. This squirts fuel into the carb and sets up on fast idle and full choke
2. Turn the car over...it should fire up without any additional work.

If last started more than a month ago it might take seconds longer to
start but it will start without any pumping the gas.

When you have to pump for gas it typically means your not getting enough choke.

I fire up my 88' motorhome with 454 Chev and it works every time.

New cars use fuel injection. You never start a car with FI like you do for aspirated.

If this process does not work then check choke linkage, fuel leakage from float bowel. Leak back from fuel line.