Double Plane Intake

I got a 380 hp create 360, same cam and intake but smaller engine. Also running a 2800 rpm stall with 2.96 gears.
It's a little soft under 2000 rpm have to drive in 2nd under 40 mph.

Gears would fix the situation. Also plan on Rhoads lifters to extend the powerband lower and gain some idle quality which is fairly ruff yours should be smoother.
After that I'll decide if I need more bottom and go rpm air gap. Need better tires 1st but if it don't hook no point going with air gap.