I second Princeton.
Your ACT score, school record, and location in relatively out-of-the-way (by Ivy demographic standards) Kentucky would all work together to give you a fighting chance.
There are a number of very active Christian student groups at Princeton. My sense is that it is the most Christian-friendly of the Ivies–though, as others have noted, even a militantly secular campus will host a Christian group or two.
To top things off, the financial aid at Princeton is as good as it gets.