The hot antifreeze really does a nice job of loosening up all the gummy castor residue and makes it easier to disassemble further, so yea, just pull the carb and any plastic rubber bit that you don't have replacements for and dunk the sucker with the glow plug and backplate removed.

If you're hesitant to use antifreeze and a dedicated crock pot, then Dawn Power Dissolver is your next best bet... I've used both methods and it's pretty much down to whether or not I can get the engine apart - if it's stuck or gummy with dried castor oil, I'll just remove what I can and drop it in the antifreeze. If I can disassemble the engine then I use the Dawn.

Either method works well, but both require a certain level of safety precautions... The antifreeze is a poison and the Dawn is a caustic chemical. [:'(]

Hope this helps,

-Joe