I'm rebuilding the motor in my 2001 cobra, so I'm building it kind of the way I want it I'm using a teksid block, stock cobra crank and aftermarket rods. I'm thinking about using a the newer 2C5E-6C064-DB or DC heads and have seen them for sale as either drivers or passenger side and was wondering if they are side specific or could be swapped? I own a automotive machine shop so the machine work wouldn't be a problem if some was necessary. Has anyone else done this swap?