FI is not the only one. I bought and started to build a "from scratch" harness for the Holley HP computer. But the diagram does not properly document shields. I have a Holley harness that "upgrades" the old Holley TBI / Commander 950 to an HP computer. Finally unwrapped enough of it to determine where the in-harness splice / interconnects actually exist, and what wires are shielded.
This is a **** problem. Holley should have done a MUCH better job documenting this. And it would have taken their schematic drawing guy about 10 more minutes to properly "fix."