I didn't buy a kit from crackedback (yet), I opted for SlantSixDan's kit (doesn't include wiring, hence cheaper). However, I wished I went with the cracked kit for this reason alone:
Driving to NAPA, buying the wire, cutting it a little short for the high beam run, having to go BACK to NAPA, buy more wire, oh forgot more crimps, oh look Seafoam is on sale, etc., etc., etc.
It's the time investment that people seem to quickly forget about (myself included). Having ALL the material on-hand to complete this as a first-time A-body relay-installer means I will spend less time monkeying around selecting the right wire size, ensuring I have enough crimp connectors, etc. and have more time to do other things. Sure, the double NAPA trips were the fault of mine, but it's not something I would have foreseen as I'm just not an electrical guru. Those packs of NAPA 12 gauge wiring look like they'll run all the way to the moon, till you start running a couple feed lines to low and high beam bulbs. It eats up wiring fast.
BTW, Dan's kit was great, top quality components. I don't want people to think it wasn't up to snuff. Crackedback includes wire, Dan doesn't.
Luckily, I have 3 other Mopars that will need this upgrade including a 4 headlight C-body, so expect me as a customer someday soon.