Without a doubt, this is the correct way to do the repair, and I recommend anyone that has time and resources to do it this way.
I needed the truck on the road, so I used the 100 ohm resistor. As I suspected, the gauge reads a little low, but still rises into the 'normal' range when fully warmed up. Its not perfect, but definitely 'close enough' in my truck. Resetting the needle would correct the low reading, which I might do when I pull the cluster (again) to replace bulbs.