Rich
I say leave the clock out and install a CHT gauge along with some kind of idiot light for the oil pressure. (see other threads on Pelican) This way, when you go out for an evening drive and come home late, you could always say, "Honey, I didn't know it was so late, my car does not have a clock!"
I am going to experiment with using the rubber retainers on my gauges as well. I will be working on that this weekend since I will be installing heat exchangers as well...did I happen to say Thanks!