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That is a fueler crank flange and it uses a flywheel like an earlier Hemi, they had a flywheel that was located by the OD of the flange.

I'm pretty sure KB sells an insert to give you a converter/flywheel register in the center or you could just make one when you get the crank .




Sounds like what you need is



I bought mine from Keith Black.

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Those cranks are usually not a good idea. Besides the flat flange, they often use a different keyway up front, and are usually super heavy. There was a post recently from a guy trying to figure out how to get a special damper made so it would fit the crank that he got a good deal on.




That would be me, the damper is supposed to arrive sometime today (Thursday).
The problem was that the crank (a Keith Black Billet) had 2, 1/4 inch key-ways cut in it (one at 90 degrees and at 270 degrees).
My engine builder said if I wanted to build it right, just order the custom made damper and be done with it.
Most people said broach a key-way at 0 degrees and silicone or epoxy the extra key-ways and use an off the shelf harmonic balancer.
He said, "No, it will leak oil from there!"

Since he's the expert building it, not me, I order the balancer.


Kayse can't keep up at all now. lol