Harmonic Balancers

@66340SEDAN You said, “drill one hole bigger.” Is that due to the offset hole in then pulley?
Otherwise, the pulleys lined up OK?

Toluene56 said

After that I purchased an ATI damper, the ATI depending on the version you get is not stock width and pulleys will need to be adjusted for fitment.
The new 408 has a Trickflow Trackmax SFI balancer, this engine is new so I don't have any good or bad to say about it yet, but it does align properly with stock pulleys.

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Whoa! Separating a balanced is pretty brutal. Wow!
I did take a quick trip through summit to look at the ATI pullies and noted some with and without hubs. Which was a surprise to me. There was a lot of different versions.

The was also surprised by the trick flow pulley there. That I just found out today for myself.

Aligning pulleis can be maddening.