I too thought a set of vintage Lucas switches would be nice in my Backdraft.
I used a reverse spotface cutter to counter bore the inside of the dash panel.
Like these:
https://cogsdill.com/products/deburring-tools/flipcut/
And switch Id labels.
https://www.bits4landys.co.uk/series...s-switches.htm
My selective memory was active and I totally forgot about the pains I endured while a youngster and my MG and Lucas. Needless to say one of those Lucas switches running my Electric fuel pump on the Cobra died one night and luckily I swapped connections with cooling fan override switch next to it and got home. The Lucas switches are at home in the landfill now.
Lucas - Prince of Darkness - Lucas Electrical Humor Jokes