C-Body Manifolds in Big Block Duster
When I bought my 67 Barracuda, it already had the 440 in it out of a 73 New Yorker. It was a column shift car and utilized the stock 73 log manifolds. I believe that the previous owner who installed the engine had the left side manifold machined slightly at the mounting flange so it would lie closer to the engine block when bolted up thus freeing up space for the steering column. I'm not 100% sure about this but it is what he told me.
Hope that helps.