A Delhezi could live in a aquarium with those dimensions for life but Endlicheri can exceed 2 ft and over especially WC Endli. You still have plenty of time before deciding to upgrade. Also some of the smaller Upper Jaw species could do well in there for life Senegalus is one of them.
is that a frag tank? those are interesting dimensions... and would agree Del's would do fine in there, but the endli's or pretty much any LJ species are a different story.
The Delhezi bichirs will be fine but not the other one at least not for life.
A 5-6 ft. x 2-3 ft. is better and can be fine for life cause the endlicheri will grow to 30". a little less than 3 ft.