Flex plate swap LA to Magnum block

It'll fit, but will only work on a 5.2 Magnum (which is internally balanced); on the 5.9 the balance is different and you need to use the externally balanced 5.9 flexplate. You need to oblong 1 hole and then you can run a neutral balance convertor on the 5.9.
Thanks, it’s been a year ago sense I picked up this magnum from the engine Builder and just remembered they gave me a new sfi flex plate it’s round EX. BAL. now have to dig in the garage and find it. Thanks again!!!