I don't have an owners manual for this deck. It's an old deck with the 2 gear boxes. Can some one tell me if the blades need to be in time, or can they go in any position? Also the parts sheet I found..sears calls for a blade p/n 965R..I have orderd a set of after market blades p/n 95-013 that is suposed to replace sears 7874H which the mower deck looks a lot like mine. Anyone have a crosss reference number for those blades 965R ?