Fuel Problem?

I have a buick electra 1984. Whenever I hit 45-55mph on the highway the car starts to bog out. When I push down on the gas all the way to the floor nothing happens. Could that be the fuel pump? Also the car starts up just fine.

 

fuel filter or timing or carb settings .

 

Have a new fuel filter. Also if the car starts to bog around 35mph it will die. Thats only going up a hill. On the street the car can hit 50 and nothing happens.

 

Plugged catalytic converter?

 

It may be a plugged cat converter. But its illegal here to drive without it, but it shouldnt be to much to cost. thanks for the help.