Bench seat w armrest

I have a front bench seat with center armrest from a 69 barracuda that needs to be re-covered. I'd like to cover it in two-tone blue, which Legendary doesn't sell for the barracuda, but they do sell it for the 68 and 69 fury III. The size and shape of the seats look almost identical, but does anyone here know if the two seats are interchangeable?