Conservative Catholics would call Jesuit schools "liberal."
The Newman Guide to Choosing a Catholic College lists Catholic schools that would be considered "conservative."
Many of them have already been mentioned: Thomas Aquinas College (CA), University of Dallas, Franciscan U.(Steubenville), Ave Maria (FL), Belmont Abbey (NC), etc.
Benedictine College (KS), Wyoming Catholic, U. of St. Thomas (Houston) are a few others.
Catholic U. of America, where the religion and philosophy depts. are orthodox, is included in the Newman Guide, but most of the undergrads there are probably not that conservative.
I would guess that conservative students would feel comfortable at many large state universities in the midwest and south--and especially those schools that are career/engineering/ag.-oriented because those students tend to care more about getting jobs and aren't so interested in politics. Schools like Purdue, Missouri S&T (formerly U. MO-Rolla) or K-State come to mind. Just about any school in Texas or OK would have a large percentage of conservatives.