1966 Barracuda Dash Bezel Restomod

I just had to create an account to chime in on this! Those dashboard look diamond! I'm in middle of swapping '66 Barracuda dash on my '65 Valiant, and I'm also planning on retrofitting modern gauges at the same time, so I'd like to ask for some tips and pointers.

Robert are the speedo and tach 5" gauges? How did you secure (all of the) gauges in place? Did you modify and keep the metal frame in the dash, or just attach the gauges on the plastic cover and then bolt the cover back in car?