WHAT ARE THE BEST SMALL BLOCK FORD HEADS? HOW MUCH POWER ARE AFR 165 HEADS WORTH ON A 5.0L FORD? HOW MUCH POWER ARE AFR 185 HEADS WORTH ON A 331 FORD? CAN I GAIN 100 HP WITH A CYLINDER HEAD UPGRADE? WHY DID MY HEAD UPGRADE ONLY ADD 15-20 HP? HOW GOOD ARE AFR FORD HEADS? WHEN I ADD CYLINDER HEADS, DO I ALSO NEED A CAM AND INTAKE? WHAT INTAKE SHOULD I RUN WITH PORTED FORD HEADS? WHAT IS THE BEST 5.0L CAM? CHECK OUT THIS VIDEO WHERE I RAN TWO HEAD TESTS ON SBF MOTORS. TEST NUMBER 1 WAS THE ADDITION OF AFR 165 HEADS ON A STOCK 5.0L MOTOR, TEST NUMBER 2 WAS THE ADDITIONAL OF AFR 185 HEADS ON A MODIFIED 331 STROKER. THE GAINS WERE DRAMATICALLY DIFFERENT AND HERE IS WHY!