Truck Troubles

[TheSeeker]

Hey everyone, I have a 1970 c10. Pretty much all stock and I have been using it as a daily driver right now as im fixing it up. Everything was running fine and dandy till about 2 weeks ago. I noticed everytime I stopped at a red light my truck acted like it was running out of fuel, and sometimes it would choke out and die. So when I got it home, I parked it and started checking things out. Fuel filter is clean, spark plugs are not fouled. I pulled the top end off the carburator and I did replace the float, accelerator pump and top end gasket. Now it fires right up and idles well, but when driving it it still seems to feel like its running out of gas. The good news it is that it does NOT die on me now. Any one with ideas? The carb in question is a stock 70 qjet. I was maybe thinking mixture screws, or timing at this point... Thanks in advance for any help