'51 Shoebox Instrument Cluster

[Shoebox]

I have the speedo/gauge cluster out of my'51, actually I have the whole dash out, installing new firewall pad and electric wipers, heater core and such. Anyhow, I read somewhere that in the gauge cluster there are some light diffuser things, intended at the time, to enhance gauge lighting. Some say that now, it is best to remove these (plastic?) parts. I am hesitant to open up this virgin assembly until I know just why or what I am going to do. I have converted to 12V and will at least have the brighter 12V bulbs, can anyone shed some light (I'm sorry) on this subject?


Thanks guys!