Nice carb, 1973 Pontiac manual transmission. It's the smaller casting, not the "800" cfm Super Duty unit, but plenty of carb for what you are doing.
When you get time, call the shop and we'll get what you need headed your way. I would get one of our kits, and some tuning parts as well, as those units are pretty lean (emission calibrated)....thanks...Cliff
740-397-2921