Made some progress today. I traced all the wires on the wiring harness and compared them to the diagram....checking termination location and color. I also checked continuity for all the circuits. Everything was correct except one wire that was labeled black on the diagram was actually black with a yellow stripe. I had the cannon plug hooked up and check the bow end of that when the circuits went up there. I still need to check the trim/tilt wiring harness, but everything associated with the engine and gauges is ready to go. Originally everything was wrapped in electrical tape. But I striped that off when I had to modify the wiring harness for the length of the 6 cylinder.
I took off the duct tape and put electrical tape around the wires to bundle them up. Then I installed some split loom.
I couldn't use the T's everywhere because of the spacing of the branches...but it did work well where I could use them. Not exactly a factory job, but cleaned things up.
The oil pressure sender interfered with the wiring harness where the cannon plug hooks up. It had a couple brass fittings between it and the block that angled it up. I looked at my old 4 cylinder and it screwed strait into the block.
So I took it off, removed the brass, and reinstalled it. Works a lot better now.