I also used a YnZ on my 48. Very happy with it. Only had one problem and was solved with a phone call. Only wish I would have talked to them about adding turn signal wires. If I remember I just ordered it online.I was really apprehensive about doing the job, but it wasn't that bad.
1946 Chevy 3100 1/2 Ton Pickup Purchased 11/18/17 1948 Chevy Fleetmaster Coupe, Purchased 6/20/2010 1962 Ranchero with V8 conversion Purchased 4/2017 1996 Monte Carlo 63,000 Miles, purchased new --6/16 Donated 2013 F-150 Crew Cab
I bought my wiring harness from them for my 1928 LO Truck.
Now this was years ago (+20 years or so) but their workman ship was excellent. All of the wires were clearly marked and they provided enough wire to allow you to easily terminate it with out being short of wire.
I still have the harness installed in my truck and the cloth covering still look great.
Mike Quezada (559) 250-5427 mike.quezada@M2ProSol.com