Based on what others have done you could; modify your existing tank and use the donor pump, put a fuel cell in trunk with donor pump in it, purchase a tank inc. (or other brand) tank, regulator, and add return line if applicable. There would be benefits, sacrifices. Using the stock fuel pump simplifies the process but brings challenges like properly venting fumes from trunk with a cell or having a cut out in trunk to allow for top of donor pump on stock tank needing clearance. Costs would vary based on approach. I'm no expert but hope I was able to help in consolidating some of the great info I received from others.
