Bruce,
If you get the list number off of it (front of Choke housing, will look like 0-4478-11) you can then find the factory set up at: (probably)
http://www.holley.com/HiOctn/ProdLine/CarbList.pdf
If (or once you do from the list number) you know the series, you can find exploded views at:
http://www.holley.com/HiOctn/TechSer...o/FMCTech.html
I'd suggest picking up a book if you are going to get too involved, but checking jet sizes is as easy as pulling the fuel lines and the 4 bolts out of each float bowl and looking at the numbers.
You're Probably going to want to pull the carb to do it, since I've never found a way to keep the fuel from going all over the engine.
The carb may or may not have limited reusable gaskets, and you'll want a base plate gasket on hand too.
I used to have a good website on Holley tuning, but can't find it right now, maybe someone else will pipe in with one.
Edit: Here is the site it might help, but these guys here are probably the best resource for a cobra application.
http://www.bob2000.com/carb.htm