69 chevy c10 250 inline 6 cold starting problems

[tebow217]

Hi I have a 1969 chevy c10 pickup 250 4.1 inline 6 I am having cold starting problems she will fire right up when its warm but when it is below 40 she will not start with starting fluid I have checked the fuel pump it is pumping plenty of fuel but it still seems to be staring for fuel its weird new carb it was working fine had no problems up until about a week ago I would have to pump the gas 5 or 6 times and she would fire right over. I am new to this truck have only had three months any help would be appeciated