Looks like you don't wanna deal with taking the dash off to replace the 3 stock centers, can't blame you haha. If you don't mind blocking a bit of the left and right of your Center cluster, I've seen some that add two 52mm gauges to the center cluster shroud. I thought about grabbing one, cause it keeps the 4 stock button placements. But it does block your left and right view a bit on the cluster. Also there's a steering wheel gauge holder I think, that would place it right there in the most obvious and easy to see place. Agreed on Blackstealths boost controller and ECU items though. In fact I love the placement right above the steering wheel with his as well.
My Uncle was in the air force, and worked on planes, so I get you, I loved walking into some of the older cockpits and seeing the loads of gauges around. Necessary? Not at all. But if you like it, and aren't just set on keeping it stock why not. Build it cause you like it, even if someone else doesn't.
I like my gauges to be easy to see though for the important ones, don't wanna take my eye off the road for to long ._. I'm getting old so I need good visibility, on both gauges and the road haha.