sorry, I know what you mean at first then it hit me
at least I think I do
Yea I did this too
I just loosely installed the heatshield and placed the snorkel where its suppose to be, measure, took off the heat shield and cut it.
You just cut where it hits the heat shield, I just did a rectangular cut. Do not worry about it bolting up the the small screw up front because that wont really matter. It'll still hold find.
Ill try to take a pic later of my cut