I bought a kit from Speedway when I did my 49. It was the 18? circuit so I had plenty of room to add power door locks and stereo, etc. It was well marked and included everything I needed. I had never wired anything from scratch and rolling out all those coils of wire was a bit daunting but the instructions were very good and it wasn't all that hard if you follow instructions and just take it a step at a time.
