Idles fine then wants to die driving

I think that I am having a fuel starvation problem due to a clogged fuel filter. The motor is a 360 in a 72 dart with an electric fuel pump and a filter before and after the pump. The car will idle fine for however long you want it to, but on my way to work (4 miles) it tried to die as I pulled in the parking lot. I thought the electric choke hadn't come off and was flooding it. After work it started and idled fine, and after 2 miles was sputtering at 2000 rpm. I pulled over and let it idle and it seemed fine. I got back on the road and the last 2 miles was constant sputtering, but idled fine in the driveway. I think the tank is full of crud and stopped up the pre pump filter and is starving the motor. What do you all think?