Motorcraft WR4110 Spark Plug Wire Review

I ordered these to replace the original spark plug wires on my RV. They appear to be of good quality and fit well, but it would be nice if they were numbered like the originals (and like the plug cords I've gotten from other manufacturers). I marked both ends with a marker because it's a van chassis so visibility in the engine bay is poor and I wanted to be able to identify each wire without tracing it back to the distributor. Also, the rubber tabs were gray on some wires and black on the…