Square bore to not so spread bore?

I bought a 400 cfm AFB for my Dutra intake. I have a square bore to spread bore adapter, it will bolt on but seems like it will be… turbulent. I’m not sure what adapter I need but here are some pictures of what I’m looking at. Any recommendations or parts numbers would be appreciated.

IMG_1114.jpegIMG_1115.jpegIMG_1116.jpeg As always thank you, Carson