This guy has good stuff for rebuilds, and info on the carbs
https://www.carburetor-parts.com/quadrajet-nums.html
Carb number 7045213 I think? Here's a kit Rochester Quadrajet Carburetor Rebuild Kit - K4004 - https://www.carburetor-parts.com/k4004.html and maybe part of the choke Rochester 1 &...
Is there a choke cable and/or knob for such on the dash? Wonder if they had some sort of manual cable choke. Just a guess. I've too heard the Qjets are good for offroad. I run a Carter AFB because that's what was on it lol.