Yeah, it definitely isn't right. Just haven't had much time to play with it. It shouldn't be this hard, there is only a couple screws to tweak for the idle settings. Maybe I missed something in the rebuild.
Backstory....
When I got it, the car didn't run. The carb that was originally on the car was completely gunked/dried up and wouldn't run so the seller threw in this 4150 I'm working with now. It was screwed up too and was just dumping fuel into the engine so I rebuilt it, but maybe missed a blockage or something? I'm going to rebuild the "original" holley 4165 List 6711 that is on the shelf now over the winter. It is a correct Thermoquad replacement for the '71 340 and I like the idea of the spreadbore for the street. Car goes to the storage facility for the winter on Wednesday so unless I come up with a non-invasive magic wand, I'm going to live with it for now. I just need to get it into storage and I'll deal with it in the spring. At some point I'm going EFI, so I hesitate to drop ~$400 on a new carb that will just get replaced.