With the problems you have with just the shipping screw up, poorly installed seal, poor instructions... Id be worried about the quality of the procharger itself!
Don’t these types of blowers need to spin at like 50-60k rpm? Even if that engine does 10k rpm that’s only 15k impeller speed. I feel like it would need more of a gear reduction than 1.5
FYI ATi dampener racing crankshaft harmonic balancer yes they work but street crankshaft harmonic balancer are limited to a certain Horsepower. The best crankshaft harmonic balancer is actually Fluydampr. It uses fluid to balance the rotating assembly, ATi does not.