Done and installed (Sorry, Bullet, but there'* plenty more to play with).
WARNING. You better make damn sure you've got it aligned well before welding. Road test was a grinner. INSTANT throttle response off the line without the drivetrain flexing. I can FEEL the engine vibration through the steery wheel and the go-fast pedal. Not bad, but I know it'* there.
I should be able to dampen about half that out with a little magic. Won't be tomorrow, I have a radiator to replace in a Toyota tomorrow.
Again, favorable results, but much more abuse on the diff. This is for the well-built trans ONLY. And it'* not done yet.