The fuel system is pretty straightforward, just buy some reinforced fuel line and compression fittings. If you have an LS1 or LS6 fuel rail, you will also need a fuel pressure regulator/filter. The GM regulator mounts perfectly in the old location of the Porsche fuel filter. I cut the fuel lines just before the filter and used -6 AN compression fittings to transition to a flexible reinforced line.
BTW, if you decide to run truck ignition coils (which are better than LS1 ones), the fuel rail connection will not clear. You have to cut the tab that holds it to the rest of the fuel rail and bend it off to the side. I don’t have an up close picture, but it should be visible in the one below.