It’s a Rochester bc by the looks of it .will have to see how it goes you say it was taken off and tampered with ,if so may become a factor as the process evolves .leave it until the other issues are sorted out. Most trucks came with a Rochester b carb with a Manuel choke yours is a non functioning auto choke,and looks like the linkages were bent to fit but leave it until Jerry walks you to that fork in the road.
