ok, you'll want to leave the FRx in place, BUT, remove line from the "T" in the FRx, going to the FPR on the stock fuel bowl. You'll use the FRx lines to feed the wvo to the heads. The stock D2 lines will need cv's at the heads to keep wvo from backflushing into the D2 tank.

To keep D2 from filling up the wvo tank, thats where another cv will come into play along with a purge valve to help "flush" wvo back into wvo tank via D2....

https://www.ford-trucks.com/forums/m...ut-137436.html