I'm not familiar with the 2.6L intake, but from posted comments I would assume that an adapter plate between the 2.6L intake and the carburetor could be made to work. It's commonly done on other engines to adapt a Holley to a Rochester or other mount. Here are some examples:

Adapters

Here's a Holley 2bbl/Weber single throat adapter - won't work on the 2.6L dual port intake, but just for an idea:

Holley/Weber

The staged dual throat carb is designed to provide better fuel metering and atomization at low rpms so some attention is needed when switching to a larger CFM 2bbl sychronous-opening carb like the Holley design in order to keep from having a low-speed bog. Good throttle response can usually be achieved, but may require a jetting change, accelerator pump and/or pump cam change and a power valve change to get it right.

When it comes to carburetors there's still nothing better for tuning them than a good seat-of-the-pants gauge, a good eye for reading plugs and a box of parts.

Frank