^ Would like to know this as well.
update since i got someone's attention...WORKS PERFECTLY got the level down basically untill all the lines disappeared on the fuel gauge
didn't go WOT but didn't break up under boost either uphill and everything. overall works like stock
I left the stock venturi in place to leave the inlet outside the bucket "plugged" and I ran a hose from the radium siphon to the in tank hose that pulls from the other gas tank. only finicky part was installing it like this cause I had to get the fuel pump assembly halfway in before i could grab the hose.
but all in all a great work around to drilling and guessing about return pressure. New regulator installed and fuel pressure very stable.