I feel like I messed up bad - new to me truck issues after purchase

[Stocker]

Congrats on your new truck, it looks like a real beauty. My truck once ran similar, at least in part, to what you're describing. Turned out to be a clogged filter in the Q-jet carb. I replaced the old paper filter with a new sintered bronze filter and the problem was solved. Good luck, you'll find / fix it.