We wanted a more positive way for it to center on basically and did not like what we had. So went this way. It does stick out a bit could have probably machined the bolt a bit more/

The BB stuff just snaps together. If your damper has the BB Chevy front then there is a raised area for the trigger wheel to center on.

Feel like an idiot. I see it now, just didn't expect it to register on the aluminum balancer ring. I was still looking for everything to center on the hub. Now to get the brand new hub machined so I can actually fit a crank bolt under the drive mandrel. Someone should just go ahead and make these for us to save the hassle.