It would hook up and function the same as the dual jet, but chances are with an adapter from a 4 bbl to the 2 bbl intake it would not give much of a performance boost. hood clearance would be a problem. Also if it has been setting for any time at all, and because it is old to start with, putting it on without rebuilding will probably just muddy the waters.
Nothing I recall was built with a sideways motor that had a quadrajet.
Remember the intake can be changed but if you use an intake from any rear wheel drive, the carb will be oriented so it sets on the motor at a 90 degree angle and wont perform well due to fuel slosh uncovering the jet in the carb facing the front.
Just rebuild the 2 barrel.