Wow. What a discussion. Head modification should be driven by the intended service (street, strip, road course).

I've only been into the C32A1 engine (G2 Legend) and those are the shortest, straightest ports I've ever seen (used to play with all sorts of american iron). I would think the 4cylinder heads are similar. IMO all they need is port matching and blending of the valve guide boss on a street engine.

On the subject of polishing and atomization: Those concerns apply to carbed engines. Injectors fully atomize the fuel (when clean) and are timed to valve opening. C32A1 injectors are aimed directly at the intake valves, bet 4 cylinders are the same.

Finally: Head porting is as much an art as it is science. Chose your "artist" based on his previous work.