Some problems:
They face south east/west depending on the arc. You can probably win 180 deg from that, not that directional.
Not sure how they are with the higher frequency band stacking, the OTA is below all Dish signal < 700 MHz.
They may have a line-powered amp, which may or not work to the high Dish signals.
They usually had 2 in and 2 out for Legacy but that might be good for two newer dish signal?
It was good enough in its day.
-Ken