To anyone who's considering this:
Bigaudiofanat made me a fully plug/play harness setup that worked exactly as you'd want it to. No cutting or splicing the stock components was necessary...and it was completely hassle free since I didn't have to fool with doing any of it myself. I shipped him the METRA harness, speaker adapter, parking brake bypass, pioneer harness, ASWC-1, and he shipped me back 1 harness all wired up and ready to go. Everything was heat shrunk and zip tied up nicely. He even updated my used ASWC-1 which I didn't ask for. The transaction went smoothly and he was even around to answer a few dumb questions I had during the install.