Looking at an 02 DCB Mach 26 w/o power. Owner claims approximately 300 hours on boat. For 8 years was rigged with over 1000 hp, Bravo/Imco set up. Owner claims speeds of over 135 mph. Boat looks clean except for some light stress cracks on the top of the transom, next to the back edges of the engine cover. Is this a major deal or just cosmetic? Was thinking about re-powering with a 525. Appreciate any and all help, don't want to make a mistake.