I'd hardly call Rush conservative; libertarian might be a better label - at least in regards to their earlier years. Either way, 2 Rush songs made the National Review's list of the top 50 conservative rock songs; The Trees came in at #11 and Red Barchetta was #22. Here's what the article said about these 2 songs:
11. "The Trees," by Rush.
Before there was Rush Limbaugh, there was Rush, a Canadian band whose lyrics are often libertarian. What happens in a forest when equal rights become equal outcomes? "The trees are all kept equal / By hatchet, axe, and saw."...
22. "Red Barchetta," by Rush.
In a time of "the Motor Law," presumably legislated by green extremists, the singer describes family reunion and the thrill of driving a fast car — an act that is his "weekly crime."