Also, I've been discussing fuel pickup methods with Adam Quella. Adam recommended that I use an external fuel pump, pre-filter, and main filter. Here are a few pictures from Pantera Performance Center's Facebook page:
Here's a pre filter with integral ball valve and a fuel pump. Adam Quella said this is an older version of the current setup.
Here, they combined the final filter with the fuel pump and a remote oil filter.
Here's the pickup elbow under the gas tank with the pre-filter in the background. The drain plug is a M22x1.5 threaded plug, which makes it hard to find an adapter. Notice that the gas tank support is bent slightly to allow for this to happen.