I hear ya. Will hold off trying to tune further until I get some decent gears in there (3.55 or 4.10). The detonation which is mostly if not completely under control right now IS being exacerbated by the load which is FU#$% up because of those gears and probably the converter. I was told it was a high stall torque converter but I think I was lied to and the guy skipped out of town. He is not somewhere in Minnesota ripping off people...