Im redoing a 96 600xlt motor for my dad this summer it has 5000 miles on it The problem is that he melted the center cyclinder im 100% sure it leanded out . It is all stock I was thinking of just putting rings in the other two holes and going 10 over in the center . trying to talke him in to milling 10-20 off the head and puting in some Boysen reeds . will I have to readjust the timming if I do it . Or any other sugestions on what i should do or look for ? NO pipes NO pipes NO pipes !!!! He whants it stock!!!!!!!