header clearance problem on my 67

I AM RUNNING 67 MUSTANG W/ A 302 AND A C6 TRANNY I ALSO HAVE MANUEL STEERING. I BOUGHT THE PATRIOT MID LENGTH HEADERS THAT LOOK MORE LIKE SHORTY'S TO ME. BUT THE HEADER FLANGE IS HITTING THE STEERING BOX AND SO IS THE COLLECTOR WHERE ALL THE TUBIS COME TOGETHER. HAS ANYBODY RUN INTO THIS PROBLEM? WHAT HEADERS DO YOU SUGGUEST?
ANY HELP WOULD BE GREATLY APPRECIATED.