In 2002 I was still replacing cranks that were junk from Moroso single piece dampers. And I'm talking nice, aftermarket cranks.
The two biggest deals with dampers like you are using is overall diameter (weight) and the durometer of the rubber used between the outer ring and the hub.
I would rather have what you have rebuilt if and its a big IF they can tell you the durometer of the rubber is OE.
I've never seen an OE Chrysler damper fail, but I did see a couple of GM ones fail back in the early 80's and it was a hell of a mess. Not as bad as a clutch but bad enough and that's where the SFI damper rule came from. NHRA had to decide when you use an SFI damper they picked 9.90 at the beginning. I don't know where it is now but I think it's slower than that.
