113.36 long, 50.18 wide and 68.66 tall? Sounds like about 9.4' x 4.1', or a little over 38sf, right? Does that include the nesting bays? How much space do they take up?The run is 10x20 the coope is 4 Nesting bays and 3 resting bars (113.36" x 50.18" x 68.66")
The run is definitely big enough for 8 chickens, just be sure to add in more than one feeding station and plenty of obstacles.
Have you considered building your own coop and just buying that run?