JEEESH!!!

BTDT, it's highly overated.

Page 26-27 of your manual will tell you everything you need to know. Make sure you keep your old and new parts separate and organized.

Digital camera sure makes it easy to take photos for reference, I use mine for that purpose all the time, especially for things like the drum brakes, can also take apart one side and use the other for reference.

Soaking the carb in a solvent is a good way to make use of the solvent used, spraying works on more recent varnish and contaminants, I've got a small engine carb that was totally gunked and seized, I put it in a can submerged in gumout for over 1 year, it should work fine after I rebuild it with parts from a kit.

Most times and for these old tractors, they should be simple to work on, good learning experience, put a clean rag or cloth on a well lit up bench, and go to work, I can't count how many I've done over the years, automotive ones have more parts, and some don't like to be turned upside down I've heard, always wondered about that and if it was true that on some of those the parts can dislodge from where they are supposed to be when turned over, say like a GM rochester quadrajet.