I just bought this 96 XP a couple months ago, I knew it needed some impeller repair. So anyway I pull the pump, and its all aluminum with the bronze vanes, is that an original pump for a 96 or has someone changed it out with some other year? Searching Ebay it looks like most of the pumps listed for the 96 are plastic with the bronze vanes. What years did they use the aluminum pumps, I want to make sure I get the right replacement parts, bearings, seal, shaft.