The main problem with a different carb is that all the peripherals must now change to accommodate it; throttle linkage, pcv setup, fuel pipe, air filter, etc. Adding the extra $200 of a new vs rebuilding carb to that, and I might seriously consider the headache of TBI. The definitive support takes shape in "look for this, this, and this, and if it has it you have this model of carb. The quadrajet is the first object I have ever encountered where the serial number directly and definitively corrolates with what parts fit. All other instances gives more of a "be advised" notification.
