My 1978 200SR 21' SeaRay Cuddy cabin had the uppergear case rebuilt last year.My upper gearcase blew up 11 months later and I was very kind to it and checked the fluids regularly. I must get it fixed this Spring and am wondering if a Volva Penta change out is a good idea. My mechanic told me that the gearcase design is poor and the after market parts are of poor quality. Who out there has the technical advice to offer an idea to make my gear case more reliable with a better quality upgrade ... and price estimates. I live in Rocklin, CA.