STEVE PATTON
I smell a conspiracy
Have we established whether it's crank speed, driveshaft speed, or wheel speed?I don't think a misalignment would cause that kind of vibration. I mean, it might be wearing the piss out of your thrust bearing or the pump bushing.
Now, the convertor, you had modified...did they rebalance that? Unbolt the convertor and crank it up. Engine or transmission??