I have a 1991 Cherokee Laredo that has the popular oil in air filter problem. After reading threads on here and purchasing the hoses mentioned i installed them and still oil in air filtler. Now after reading more threads on here I've come to the conclusion that I need a new valve cover to fix the clogged built in pcv valve. My question is will a 1993 valve cover fit on it? I've searched the web and am not having luck finding one for my '91.