Thanks again, Dan. I meant to say the yellow/black wire, because as you correctly pointed out there are two yellow wires coming from the starter. Glad to know I wasn't missing anything by thinking that yellow/black was no longer needed. The engine wiring harness is greatly simplified with EFI in one aspect, but is also complicated in another due to the many ECU connections and power distribution required. I'm also likely over-engineering the whole thing, wanting to keep things tidy and looking "new"
I'll have to confirm if I'll need to do the same pin 85 grounding that you did. I might not need to do, though, based on my initial overview of the wiring diagrams I have. The things that give me pause are always that the official diagrams and what has transpired over the years of the prior owners don't always line up... hehe... Good thing I'm an engineer at heart and like to solve problems. There's a never a shortage of them with these old cars!