Hey everyone... my vette is gonna be here in a couple weeks, and I'm planning on picking up an Alpine CDA-7897 HU to go in it. I was originally planning on doing a complete system replacement, but that's going to have to wait for some time in the future. I know that there is a PAC converter which makes the whole thing a painless operation, but is that PAC necessary, or can you just use a regular harness, crimp, and go? What are the advantages and disadvantages of each of these approaches?