Installing Rallye Dash in a '74 duster issues

After seeing some prices of plastic chroming I may just end up painting. I don't have to be correct since its a custom application anyway.

Good advice, I will just use the hole in the dash for something else. thanks

How much do you charge to calibrate guages?

Just tack weld some thin steel sheet to the back side of the hole, grind flat and bodywork it, or put a pushbutton start?