I am doing conversion next week, ordered parts yesterday. I will post pictures of process after testing is complete.
So far I have modified purple box to remove the fuel pressure regulator air lines and have tapped into the WOT switch so it it will also activate a second solenoid for fuel. The fuel solenoid will be mounted to the outside of the purple box.
I ordered a fuel solenoid and wet kit nozzle from Summit yesterday.
WARNING: my mod to the dry ZEX purple box voids all warranty and you cannot go back to using it as a dry kit box!!!