Intake plenum divider modifications.....

I thought about doing that exact mod to my Air-gap but asked opinions from 2 top engine builders first and they said just use a 1" spacer, that there wasn't anything to gain cutting the divider back so I took their advice. Found the 1" spacer really woke up my 408, like night and day. By your description it sounds like you've already ran this intake? If so did you do a before and after comparison?