You only need about half of it. I might strip mine down or I might just stuff it behind the the dash and forget about it. I like the way the Lexus harness unplugs into smaller parts. Try to document your build as much as possible. When a few people have completed this swap we should make a thread like they have for the 3rz.
Have you decided how you are going to control your fuel pump?
I am documenting it. I was just gonna wait until it was running before putting together a build thread. There are several 1uz swap threads that have been floating around for years and never fininshed and it really irritated me. I'm not using hardly any of the body harness with mine. Using all the Truck stuff. The actual wires to make the engine run are almost the same between the two harnesses.
As far as the Fuel pump goes, my wiring guy is just gonna wire it to go on and off like the toyota one does. I don't care about the dual speed pump control or anything I just need high. I think the low speed was just for noise control since the lexus tank was right behind the back seat.