They should just be well nuts. Available in the weird hardware and assorted dodad drawers of any decent hardware store. ACE or True Value. Not so much the big boxes
Edit: I looked and stand corrected. Home Depot carries them.
Download this PDF. And skip down to page 56 or 57. That will show the assembly of the upper tilt in real pictures. Hope it helps id the missing pieces. https://www.crankshaftcoalition.com/wiki/images/d/d6/Jazzman_Steering_Rack_Rebuild.pdf
Yes. Your choke is missing.
This might get you started but it will need a rod and works better with the little cover. Might have to hit up a restoration place or a junkyard.
Not an expert on the 700r4. But I do know that the TV cable is vital to the survival of that transmission. If you replaced the Carburator and didn't get that TV cable just right that may be part of the issue. I'm sure someone with more knowledge will chime in soon.
Nope. Those are K30 axles. Well, to be more accurate the front is a K30 axle. The rear could be a K20 14 bolt or a K30 14 bolt. If you measure spring pad to spring pad on the rear you'll know whether it's a K10/20 frame or a K30 frame. One tons had the springs closer together. K10/K20 rear...
Not sure about where all the parts came from but that appears to be a factory 4-wheel drive frame.
It also appears that you have a Dana 60 one ton front end and a 14-bolt one ton rear end. Great combo of parts. But I think its safe to say you have a Frankentruck. I hope you can get it all...