Slant 6 troubleshoot help!

I’ve been trying to track down the problem with this slant since January.. my schedule is busy as heck but u try and work on it as I can.
Starts but won’t idle or run right. I can make another video if need be. Replaced carb(3 times...), distributor, wires, plugs, points, vacuum advance, most relays on the firewall, fuel pump & filter, fuel lines and a few other things I may be forgetting. Anybody have any ideas on what else I could check? I understand it’s hard to make a guess with a video opposed to being here in person of course. I appreciate any and all of your time!