Burning real rich after winter storage

Hi everyone I have a a 360 stroker motor with a 750 quickfuel double pump carburetor it ran real good it has been stored in a heated garage over the winter I started it up and drove it about 4 miles at a steady throttle it surges like it is loading up then a little tap on the throttle it gets smoother when it is wot it runs strong at idle it will make your eyes tear up because it is so rich what could have happened or any suggestions would be greatly appreciated thank you Tom