You can bypass the backplate pump...just use a loop of fuel line and connect the inlet to the outlet.

Keep an eye on those old backplate pumps. Sometimes they work well..but with 25-30 years of age, they can leak, or pump bubbles, or the check valves can go bad.

If you have a "Pump Carb" however, it will not work w/o the pump. There is no venturi in the pump carb, so it will not draw fuel well, if at all...it acts more like a throttle body (it's a "pressure carb" )
The throttle bore of a K&B .61's pump carb is .375" and is straight through...no venturi constriction.

A V30 pump is virtually the same as the old backplate pump.

Edit: The pump carbs are all Perry's
I don't recall ever seeing or hearing about a special "pump" carb made by K&B...FWIW