The converter was made for the car and the motor. I hade a $1200 8" cone in it that was for my buddys car same motor #200 more (he runs low 10's). it was the slowest of all. all of the converters were from 11.18 to 11.38. 118 to 126 mph. the cam pulls from 4000 to 8000. the converter I have should be right on. I just know it should run much faster with the combo I havce now.
So every one so far thinks it is not the heads???
Thanks Bill C