Funny, I just came up from the garage completing that very task! You either want a little container to snake in under one of the lower bowl bolts OR put a lot of rags under the carb to catch the approx 3 ounces that will spill. Loosen all 4 bowl bolts a little to relieve tension. Remove one of the lower ones and let drain.
Remove the fuel inlet line at the bowl. Remove remaining bolts. Carefully remove the bowl while assiting the removal of the gasket. If your careful and you have the right type (so it does'nt tear) you can reuse. Remove the jets (reg screwdriver, no big deal) install new and reverse process. Torque bowl bolts to 25 inch pounds-not much. Fire car (FIGURATIVELY SPEAKING) check for leaks