Hahahaha, I just went through that scenario!!!
Doing the bellcranks, huh!
Ummm, well... what helped me out was the Spruce website, talking to builders and the Standard Aircraft Handbook. Between those 3 resources, I have learned enough to be dangerous!!!
I haven't found a single site that clearly defines, "this is a bolt, and this is a nut."
What also helped was buying a few extras for assembly use. Get a gauge too. They are handy and sets you mind to ease knowing that you have the right bolt.
Any specific questions? I will try and help, but remeber... I am only one step ahead of you! Keep 'em easy!
OH, and have fun doing that flutin'!
You got your work cut out for you!!!
Mine only took a month!
CJ