Flex plate cracked

Sometimes because of production tolerances the crank centerline and bellhousing centerline are offset enough to cause the flexplate to crack. Mopar Performance used to sell offset dowels to correct the problem. If it is more than .008 it needs corrected. On an automatic you have to gut the trans case ,rig a dial indicator to the crank so that it indicates off the pump housing bore to find how much it is off and which direction to put the offset dowels.The dowels came in .007,.014 and .021.If the indicator shows .012 runnout for example, then the crank is offset 1/2 that amount [.006] so you would use the .007 dowels which would get you withiin .001. It is easier to do than to explain.
If you have an MP catalog you can find the dowels in the tranny section .
I don't know if they are still available or not.