DURING CLIMBOUT ON A GO AROUND, THE PILOT REPORTED A REDUCTION IN RIGHT ENGINE POWER. REPORTEDLY, THE PILOT MAINTAINED A NOSE HIGH ATTITUDE UNTIL THE AIRPLANE STALLED AND CRASHED IN A NOSE LOW ATTITUDE ADJACENT TO A SINGLE FAMILY HOME. WRECKAGE EXAMINATION DISCLOSED THAT BOTH CARBURETORS WERE LEAKING AIR BETWEEN THE CARBURETOR BOWLS AND THROTTLE BODIES. A WITNESS REPORTED REDUCED POWER, BUT THE ENGINES CONTINUED TO OPERATE. THE AIRPLANE HAD FLOWN ONLY 2 HOURS SINCE THE LAST ANNUAL INSPECTION ON JUNE 20, 1990. THE PILOT COMPLETED A BFR 60 MONTHS PRIOR TO THE ACCIDENT.