THIS WAS MY BEST 604. BROKE A RETAINER AND DROPPED A VALVE. NEEDS A PISTON AND HEAD REPAIR. ONLY 200 LAPS ON THIS ENGINE. I ALSO HAVE ACCESS TO A PAIR OF FRESH 604 HEADS. THE CYLINDER WALL IS GOOD. MAKE ME AN OFFER OR POSSIBLE TRADE. NEED IT GONE. 520 358 2022 OR 520 305 5153