I have the FASS system on my truck and it works great. I noticed some people here are still using the stock filter with the FASS. I would like to do the same so that I will have the heater and the WIF indicator and water drain. Can someone give details on what it takes to do this? Can I get a fitting and let the FASS pump push the fuel through the stock pump? Do I need to remove the stock pump and use something else? If so what do I need?