Professional products balancer: which weight for magnum

You just have to look back into older information, while it's still available, when working on Magnum engines, since Mopar abandoned them years ago.
There used to be a kit available available, part number P5249930AB, that had an LA sryle timimg cover and water pump, along with the 80012 balancer. Even that kit said to use the 91013 weight on the 80012 balancer, because back then it was tested and verified to be correct weight for 360 Magnums.
Details of this part number kit can still be viewed on Jegs website, even though the kit is long ago discontinued.