Like the man said, what kind of carb is it that needs rebuilding? The only carbs that are really difficult to rebuild are the old 2700 and 7200 series motorcraft variable venturi carbs for the late 70s and early 80s. The kits are around $40 to $60 plus a can of carb cleaner. Most carbs dont necessarily need "boiling out". Its usually just the gaskets, seals and the accelerator pumps that break down and/or wear out over time. The easiest way to rebuild your first carb is to take off the top and the baseplate off and replace the gaskets. While you have the top off replace the accelerator pump and put it back together and see of that fixes you problem.
What are the symptoms, black smoke, hesitation, runs rough, backfires, dies cold, hard starting, stumbles???