We operate a Commercial Jet boat business here in New Zealand and in our 22 seater boat we run a 502 Big block of which we are thinking of replacing it with an LSA Supercharged Engine,and as yet no operators are using this engine over here yet and I was wondering whether it will cut the mustard and how reliable it would be as at the moment we are having issues with the 502 heads as the inlet valve seats have a sharp lip on the outside surface of the valve seat indicating that the heads are made of soft metal as the fuel is not dirty.the heads have just been done up and we spent over $2000 on them and they have done just 40 hrs and the engine itself has done 500 hrs since new,any advice would be welcomed,Thanks David