Single plain intakes for small engine with FI

I just realized in the original post you say you are running an LD340 on a mostly stock 318. Now I wonder if you have enough port mismatch to cause a loss of airflow on your 318 heads.
Any chance of getting a cheap bore scope down those ports to check how much of step is present where the intake mates to the head?

I just read all these posts .
No one mentioned that the sensors in the throttle body dont take readings as well in a dual plane , as a single plane .
If I were going to run a dual plane it would definitly have the notched divider , altho I haven`t messed with small block mopars , only sbc , hemi`s and my 440/505, which I run a victor intake w/ a throttle body = no complaints !
I dont have any low rpm torque problems tho.