The odometer you can just fine over the top of the tach. The trip meter you can not see at all from straight on. However it is still useable. I can get to the reset button and can view the numbers from the side between and behind the gauges. That is one of the drawbacks of going this route. However there are several pluses:
Very easy to route the wires and have them hidden - no holes in dash, a-pillar, etc. Also they do not hinder your view (as on dash or a-pillar (my opinion)) and are in the same general sight plane as the other factory gauges.
The cups are the factory Isspro one for the tach and Autometer 2204 2" black mounting cup.
Ken