5.9 Magnum to replace Older 360, flexplate?

So I can use my current converter with the weight knocked off of it with this flexplate. That sounds great. Does this mean I could use my converter then with the stock 5.9 flexplate? I see that the bolt pattern on a Magnum flex plate is symetrical and I would have to file one hole for the older converter. Does it matter where the weight on the flexplate is compared to where the weight on the converter was removed? Thanks for any info.