The Squash setup is twin pumps 400lph or 450lph (e85 version) in stock fuel bucket. There is no controller. I am running a return style system that uses a regulator and Hobbs switches. Andy is getting ready to debut a returnless system called the Uber Fueler that does everything the current setup does minus the return lines and regulator and is good over 1000hp+.
You would take out the eliminator setup, get rid of the controller, put in the Squash, tune out the FPCM, wire it up and go.