I met a very nice chap at Prescott hill-climb yesterday with an immaculate W201 2.6 litre 4 speed auto. He has a perfect 3 litre engine he wants to fit to give the car a bit more punch (it did exceptionally well on the hill-climb driving school). He thinks it is a straight swap, I identified ignition, fuelling (pump etc) and rad as possible issues. Any others and has anyone done such a swap (I'm aware of the M104 swap Brett did with Carat 3.6). Debating the merits is another discussion, just interested in the technical bits so I can pass it on.