Hi guys, Ihave a older 91 surpass engine thats says surpass on one side and FSon the other, The pushrods tubes are in front and the glowplug is in the rear. I think the man said the engine was about 10 years old. A fellow brought it to me for repairs and its in need of a new head ,I was looking at the 91 Magnum head and from the pics it appears to be the same head ,can anyone tell me is this a for sure thing. OS has disscontinued the 91 suprass head and going to there older engine site didn't help out much either.Thanks for any help</p>