middling CFB totals

i have a local book that seems to be anticipating line moves, most recently with bowl game over/unders.

how much of a gap do i need for a profitable middle? are there key numbers in college like the NFL?

an example:
Ok/Or U 49.5 -110
O 45.5 -110

would there be value in this as a rogue line? or only if the market doesn't reach this by close?

thanks...