360 mag with X heads anyone?

What in the world makes you think it's a magnum? Its older probably, or if your lucky, it's a 92 360 which is a roller LA, and would have came factory with "308" heads
Oh ok thanks for clearing that for me. Are the 308 heads any decent? Not looking to do any major changes to this motor and trying to maximize with what I got. Willing to invest in the cam and springs just to make it sound better and have decent street power. Thanks for the info