I Can Make A Horse's Head of All Your Friends

I sing that line every day in my car. There's this song from a million years ago by Wire Train called I'll Do You. There's a line I can't decipher so I sing, "I can make a horse's head of all your friends."

I know it makes no sense, but it wouldn't be the song I know and love without it. I thought I should look up the actual lyrics, but why ruin a good thing. Who knows? Maybe one can make a horse's head of all of someone's friends.