Offenhauser 360 Degree High Rise Intake #5764 for B Engine

The fact that you don't see any running around these days tells me that the newer intakes make more power.The dp4b would be my choice.
For a stock converter 383 with 3.23 gears I would look at something like a Lunati Voodoo
https://www.lunatipower.com/Product.aspx?id=1578&gid=362 or even one size smaller.