440 what am I missing here?

Bear in mind that "generally" with EFI there are 3 types or modes of operation. (1) MAF or Mass Air Flow is what Ford popularly used. (2)..Next is "Speed Density" which is what all the Mopar stockers use, and systems like Holley, FItech and Megasquirt and others use, this uses a vacuum sensor, AKA MAP or Manifold Absolute Pressure, along with temp, throttle, RPM. (3).. Last is called "Alpha N" Alpha N is considered to be the fallback for wild cam engines, and basically uses a throttle sensor, engine RPM, and likely a temp sensor

Some systems, my understanding is that EG Holley HP/ Dominator, etc can operate Alpha N at low speed where the wild cam is hardest to manage with Speed Density, then switch from Alpha to Speed Density at higher RPM.

Maybe you can gain some ground there