hmmm. the bigger heads had some surprising results.... sort of..... The best running normally aspirated SBF's we've raced before going to BBF's had the same torque issues... Made the torque band a bit narrower which is not really an issue with a 5 speed at the track, but certainly becomes one on the street....Not always "acceptable" to keep the revs above 5,000 when uptown on Saturday night playing with the guys!!!!!! Or so they tell me....