98 5.7 vortec swap to LM7 5.3l need wiring help

[shmiet]

Thanks for all the good info. I noticed that you were looking at the weather sea,l with all the wires going through it. DId you have to remove any of the wires from that? I have got around to ripping the harness out yet. And did you swap the brake, check engine, and fuel pump wires from the old ecu to the new harness? And the 896 pcm will work right?