I've been trying to figure this out for a while and finally got something working. As always there will be some data that's incorrect and you'd have to look over it for extremes. I could do normal VE tuning but since I've changed a lot at once it is drastically off. This will create a decent baseline to start from for SD tuning so long as your sensors are accurate and you have no vacuum leaks or mechanical errors. USE AT YOUR OWN RISK.

Plug into user parameters:
New Variables:
50040 - MAF
50030 - MAP
50011 - IAT
50070 - RPM

Expression:
([50040.70]*2)/(([50030.90]/([50011.240]*287.058))*DISP*([50070.56]/60))

DISP=Your displacement in m^ meters cubed. Replace with .0059672 for 6 liter which is 5.9672

Units:
Mass Airflow (SAE)- kg/s
Intake Manifold Absolute Pressure- Pascals
Intake Air Temperature- Kelvin

Create a histogram with the same column and row axis as your VE table.