David this is the car I called you about. He had 38 and 90s and wouldn't go but to 3800rpm on the converter unless he went up on wot real slow, then it would go to 5800. James Monroe said he thought 35s might help. He didn't have any 35s so he tried 33s. He also removed the check valve and no help. Air here at 6500 to 7000. With the 33s and 90s he said its still sluggish going up on converter, but better than the 38s. 468 probably should be around 700hp, give or take 50hp. I'm not for sure but isn't an 0-.5 for 750 hp and up and a 0 pump for 750 hp and down?