Trying to find a replacement carburetor for my 66 Valiant

Thank you to everyone for all the responses. I am looking for something to bolt in. Not sure if I have to stick with a single barrel or if I can go with a 2 barrel or what the pros and cons are of each? I'm not real car savvy but I'm not afraid to get my hands dirty just not sure what I'm doing. lol... One of the reasons I chose this car is because it seemed relativity easy to work on and a good car to learn with. My car does not have factory A/C. Due to fact that some POS stole my wife's car last night this is our only means of transportation and I need to get this baby running right. As of right now it's running really rough. I did a full tune up on it today. Plugs, wires, points, cap, rotor, oil change, air & fuel filter and it still runs terrible. Timing is dead on. When I give it a lot of gas it feels like it's sucking air and losing fuel. It starts to sputter and buck and will even die out from time to time. Not sure where else to go from here. :dontknow: