FULL DYNO RESULTS-8-SETS-BBC HEAD TEST, OVAL-PORT HEADS, HIGH-HP, CAN YOU MAKE POWER WITH OVAL-PORT BBC HEADS? Check out this test where we run 8 different sets of BBC cylinder heads on our 468 BBC test motor. We compared stock peanut-port BBC heads to ported-049s, AFR, Brodix, TFS, Speedmaster, Edelbrock & Dart heads. Full airflow and dyno data provided.