Reagan's view of conservatism?

On another blog, I read a comment to a posting there, quoting Ronald Reagan as saying: “The very heart and sole [I presume Reagan actually said soul] of Conservatism is libertarianism.” If Reagan said this, it is easier to align with conservatives. But certainly, people like Rick Santorum refuse to accept this: “social conservatives” are quite hostile to people's liberty when it comes to things they deem to be “immoral.”

If Reagan actually said this — I'd like to find out if he did — I'm more aligned with Reagan's type of conservatism than I thought.