Anybody done any wild dash/instrument customization?

I have been looking at doing something close to what you folks are talking about for my '65 Valiant. I thought about a couple of 5" Gauges, one being a quad style, but that seemed to be a bit crowded up on mock-up. I finally settled on using a 3 3/8" Autometer speed-o and 4-2 1/8 gauges simular to a '64 dash but with the extra gauge. This allows all the switches to remain in the stock location. Doc's Custom Gauges (www.docscustom.com) has 4 3/4" Gauges that use a smaller 4 3/8" hole that might work but I think that is only a speed-o/tach. combination.
Bob