I researched various wire wrap and wire sheath options. The heat shrink tubing I found is dominated by 3:1 shrinkage with an inner adhesive and I thought that would be more of a mess trying to remove in the case of a needed repair. I also looked at and ordered some abrasion resistant, length slit, wire sheathing from McMaster-Carr which I may install if the need becomes apparent. In the end, I settled back upon the method used by the factory for my 1975 Porsche: black electrical tape wrapped around the wires in long continuous lengths.
But first I removed and discarded all of the corrugated black plastic length slit wire sheathing - that stuff is bulky and didn't look right on my car. I also dismounted and laid over the EFI electrical panel and disconnected the EFI wiring connectors and I removed the fuel supply and fuel distribution hoses from the fuel pressure regulator to give me ample room to work on the re-wrapping of the EFI wiring bundles and sensor connection lines.
Once the wrapping was completed, I reconnected all of the EFI wiring, remounted the EFI electrical panel and reinstalled the the fuel lines.
Next will be to perform a fuel pressure / leak check, then start the engine and after warm up to perform an ITB flow balance check / adjustment.
Wire wrapping in process. I used small 4 inch cable ties to hold the wire bundles together, then removed them, one by one, as I wrapped along the length of each wire bundle and sensor connection line.
