The fuel injection required quite a bit of additional wiring to my custom built harness. I couldn't just leave it as is, since many wires were too long, so I cut, soldered and labeled every wire, installed techflex and labeled most of the groups as well. Here's the ECU mounted with a custom bracket made by Mark Luhn, though I added the rivnuts.
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I set up two paths for power. One distribution unit is fed by a 100Amp Solid State Relay and the other a 50Amp Solid State Relay with Power Surge proetction. I put all the computer stuff on the surge protected PDU and all the noisy stuff on the other.
Moved a few fuses for the windows, though most fuses are under the back seat. You can barely see the ECU back behind all the relays now. LOL