i will add this info to the thread and perhaps others will find it informative as well!
EDIT: For the A Body 12-319 pump/sending unit Holley provides a small harness that plugs into the built in pump harness where the loose wires attach to the user supplied relay.
2nd EDIT: in the instructions it says use a minimum of 12 gauge wire which I thought odd since the pump wiring is 14 gauge. Checked with Holley Tech who said use the same gauge wire as the pump wiring