Harmonic balancer question

[Nixon1]

He's broke...but since his dad helped him build it in the first place, his dad will probably cover a rebuild. But it'll have to be guzzling all colors of smoke and knocking before he recognizes that he needs a rebuild. The funny part is...he's Mr. Know-It-All engine mechanic..I asked him 3 different times if he's sure the harmonic balancer is the right one, and the flywheel too....and he said yes every time, and thought the vibration was coming from his rear end (which is also crapping out because he rebuilt it but used the same gears so it whines constantly) He just now realized that his balancer is shot. Dummy.