Best low profile 383 dual plane aluminum intake?

I would think 30-40 HP easy. The 440 AVS is a great carb. I would think that the Torker, the vintage Edelbrock dual plane with the Chrysler number, Offenhouser, or the Holley Street Dominator. Pay attention to the choke set up , or lack of one. Definitely run the 915 heads, there should be little change in chamber volume, but it never hurts to measure them. I always run Fel-Pro head gaskets. All big block Darts and Barracudas were 4 barrel carbs.