I used an American Autowire Classic Update kit in my 69. It wasn't completely plug and play as you have to do your own terminations, but it is a top notch kit with more option circuits than you will probably ever use.
I'm more of a Ron Francis user when it comes to street cars...wired several street rod trucks and cars with his kits and they have been the best I've used, so far. I have a Ron Francis harness for my personal truck project.
I am in the middle of wiring my 62 with a Painless universal 18 circuit and some switches and misc parts from Ron Francis. Both companies are top notch. I design and build electronics for a living and I am pretty picky, but the quality of both of these companie's gear is very good.