I have never seen it done, but what says you cannot port a fan cooled engine? engine temp would be the biggest prob, but i am pretty sure it wouldn't kill the engine. In the 70's(haha i wasn't even born yet), they ran a lot of 800 triple fan cooled(or open air cooled) engine, and those thing were prolly ported, so i cannot see why you cannot port that 440 fan. it still won't even be close to a liquid sled though.