978 MHz only feed

I am looking at an turn-key receiver which can receive both 978 & 1090. I am in rural N Missouri, and my interest is in adding the low-level GA AC which seem to be missed, especially our local LifeFlight, thus feeding 978 data, as I understand.

Can I feed only the 978 data? I haven’t located information about this, as the discussions are either 1090 or combined 1090/978 feeds.

Thanks.