I started my hatchling kings in 40g tanks. As long as they have plenty of hides and floor covering the snake should be fine. If it's a baby it may stay hidden quite a bit, which they do anyway, but I don't think the enclosure size will stress her out. The ventilation holes are pretty thin on the T8 but still make sure your girl cant get through them. I started a 31g carpet hatchling in a split T8 and he never escaped but kings are a little smaller. My king hatchlings were like 12g. I do think your hides are too large. They prefer tight fitting hides especially when they're younger. I also think a hot spot of 86-88 is ideal and ambient temps in the mid 70s are fine. Looking forward to oics of your new critter. Kings are fun little snakes.