Clearly the gears would have to be modified such that that this didn't happen. You are aware that people do this in other engines? The camshafts are, necessarily, identical in respect to rotation and timing between cylinders. It is possible to reverse their function (make the engine pump air backwards) by simply shifting their relationship to the timing belt. The extra lift and duration of a "hot swap" might cause contact, but in this case it does not exceed that of custom ground intake cams, so I do indeed believe that it will not do so.