Is there a difference in the pump and impeller between a 94 GTX W/580 engine and a 95 GTX W/657X engine. I just picked up a 94 which the owner had changed out the origional 580 engine with a 657X. Just wandering if I need to change the impeller. I do have an impeller from an 94 XP that had a 657X engine that I might be able to use. Could the impeller that is in there now work OK?


