CRANK WOBBLE!! Updated, found problem

So, why not run a crank hub and let the gilmer belt absorb the vibe? Hampton kits only come with hubs. Seems if it’s neutral balance, why fret? I just took my 383 crank in to be broached for a 2nd key with only a hub. Replacing the cast 400 crank with the 383 which is forged and input drilled. The Hub is like 150$. Peanuts compared to the ATI super damper, and you already have the pulley. Hampton kits, and dyers too, if I’m not mistaken, don’t utilize a damper