Yz 400f to 426 cylinder swap

Since the stroke is the same (60.1mm) can you swap the cylinder and piston to turn my 400 into a 426? Are the heads interchangeable (or do I have to get a 426 head) OR, has anyone sucessfully put a yz 450f engine into a 426 (400) frame.

im pretty sure the cylinder heads will interchange with the 400 and 426.cylinders will as well,i think the 426 has a longer stroker though,thats where the extra displacement comes from

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