70 duster: updating, and a no-dough pro-touring makeover

Hey, question for you about your gauges.

What did you do to your tank to run the quad gauge? From the info I see online, it wont work with the stock sender.

How much cutting did you have to do on the dash? Any idea if someone could get a 5" gauge on the right side of the column without having to cut the dash?

I want a dual 5" setup like yours, but I'm going to have to roll my own since RMD is out of business (like I could afford one, anyways). Really don't want to cut my dash.