IH FARMALL C

Question

When I start my tractor up it spits and spudders, and sometimes stalls, after running about 5 minutes it runs good. Last year I redid the head and it ran like new. I have new spark plugs and wires on it. I had the distributor cap checked and it was ok. I am leaning toward a carburetor problem. I need some more input before I go down that road.