I decided on the dual plane because the car is still going to be regularly street driven not as a daily and won't be revved much past 6000 RPM if it all above 6000 RPM.
I did consider a single plane quite a lot and figured that the usable power range that the single plane would benefit is out of reach of what my engine is going to be capable of, where the dual plane would help with a good spread across the range with some room to spare at the top end?
I may be completely wrong about all of it lol and I am completely open to everyone's thoughts and suggestions