We plugged up the idle stabilizer valve ports, routed some fuel lines and gave it the business. The first few cranks to build oil pressure were done with no fuel pressure as we had left the fuel pump disconnected. With a timing light on the ignition wires, we got no flashes. That sent us down a road of figuring out why we had no spark. There was also a very strange relay sounding clicking coming from the passenger side of the dash that ran for about 30 seconds then quit. The clicking was tracked down to the factory alarm system which was probably using a relay to cycle the now non existent horn. We used the alarm bypass method outlined in Clark's garage and then promptly got ignition flashes from the timing light.
We had reversed the oil pressure sensor lines, so once oil pressure did build, it pegged the gauge which then stayed pegged until shutting the engine off and cycling the key. Once this was fixed, normal oil pressure gauge behavior came back. After hooking up the fuel pump it took some cranks, but fired up very loudly with the open headers. Youtube video below.