Wrinkly, just like a stock WRX manifold!
I painted over the parts of the sensors and petcock which aren't critical for contact, and not on threads. I just wanted to help hide them. They're all installed on the back side of the manifold and crossover pipe to help hide the wiring too.
My friend Jeff helped me with the wiring harness.
He took a really interesting approach, by first cutting the connector off of the harness I bought from DIYAutotune. That way, he could remove the wires he won't need and then build the rest of it from the engine forward. Meaning that everything can be routed and shrink wrapped nice and tidy on the engine end, and it all pops out into the car where the computer will be and gets cut to the same length. To finish it off, a connector is put back onto those wires (using a connector he bought at Fry's that has solder cups) and the connector housing bolted to it.
First step was to hook things up and figure out where I wanted the wires to run. What a mess!
If you look close, you can see sharpie marks on the wires, which were indicators of where we wanted the shrink wrap and sheathing to end, as these little bundles got put into larger bundles.
Injector wiring, on the passenger side.
Here's the whole harness, just before the main connector was put on. You can see the firewall grommet sitting on the harness where it will poke through into the engine compartment.
And here's that panel where I am mounting the computer, under the back seat area. You can see the new connector soldered and shrink wrapped into place, and another group of wires which aren't going into the connector. Those not routed to the computer will be going to relays or to the front of the car.
Finished product:
Here was the initial startup video:
Subaru EJ22 bug - YouTube
By the way, if you have a spare minute, be sure and check out Jeff's other videos. There are several other engine swapped cars in there:
55superbeetle - YouTube