Okay, it looks like Streetheart did write it, but didn't record it or they did and then sat on it for a year. Meanwhile, Danny Spanos recorded it and released it. A few years later it was recorded by Brunette. There was at least one other cover before Hardline covered it. Man, this song got around!
The names listed under "Written By" are these guys.
I saw these guys open for Rush once. They also toured with Sammy Hagar, Styx and AC/DC.