DJ S.... I did what the others are suggesting too, and it does work---- heat the area of the carb you want to disassemble with a hot torch then quench it in a bucket of cold water.
I don't have an acetylene torch only a map torch and it worked well. I did 6 Zenith and Holley carbs last summer that I bought at an auction of Model A parts, and never cracked a single casting. As Tom said, the secondary well can be a booger I had to reverse drill two of them out but they popped right out no problems.
When you are ready to rebuild, I would buy flo-tested jets from Renners. Don't mess with what most of the vendors sell they are usually off. I got a set from them and man what a difference!! Car runs like it is supposed to
http://www.rennerscorner.com/carburetor.html