I have one 94 on my 261. I used a Langdon adapter for a four bolt carb. It fits the 94 very closely and even has the location for the third mounting hole...
Anyway.... It made a world of difference over the Rochester.... Mileage doubled and performance increased by a lot....
I build these carbs on a semi regular basis and had a few to choose from so buying an new one was not in the picture for me. If your able to build and set up your own carbs I'd recommend trying to find nice rebuilt or rebuildable originals as they are a lot cheaper and work very well.....Parts and kits are readable available and they are not at all difficult to work on.

Rich