Drivetrain Vibration

I don’t know much about balancing crank shafts. The same guy did a balancing job on the crank shaft of my brothers swinger and it runs smooth a f at any speed.

I think those vibrations at higher speed are caused by something else.
The car also steers slightly to the right but I got that checked twice by a shop.
And it’s not the power steering. When the tires are fully lifted, they don’t move.

At first I try to get that tranny mount straight.