Jake - - I happen to know
@Fordtech86 doesn't have an L2850. He was just speaking from his own experience with batteries/ID/Group #'s, etc.
He's helped us out with a vehicle problem - - that one was a Nissan Rogue.
I did a quick Google Search, and this showed up about Group 30H dimensions:
Group 30H Battery Replacements
It depends on whether it is a thick plate deep cycle or thin plate stop/start battery or a dual purpose combination. The dimensions should be roughly 13.00 x 6.75 x 9.5 to 11.9 inches tall.