From an aesthetic standpoint, I really like your proposed gauge layout. I've never really liked the multi-needle gauges I've seen, but the arrangement you've got looks really good (not cobbled). I like that there are no redlines, as red fades in the sun and "redline" for this motor may not be "redline" for another.
I really like the main gauge a lot - like a lot a lot. If/when I do Project X, I'm going to think hard about something like this. I was planning on just doing a big Autometer tach and a cyclometer on the column for speed and odometer, but your idea looks better.
I like that the oil related stuff is in one gauge in a prime position. The voltage and gas gauge is not my thing, as I don't see any need for either (but that's just me). I'll keep saying it until I'm too old to care, but if a guy has a working trip odometer - the gas gauge is just superfluous. I suppose volts are important to somebody for some reason, but not to me for any reason I can think of.
CHT is a good thing to know. I'm curious what you've got behind the spokes on the wheel.
Mostly, I like watching what you do to your car, Carlos. There's been a lot of thought behind everything you've chosen along the way. It's fun to watch.