Flexplate is not fits the torque converter

Achill said
I have an engine 5.9L from Jeep Grand Cherokee 1998. In summit it's shown as:

Engine / JEEP
5.9L/360
Mopar small block Magnum

Looks like I'm back to basics :) is it Magnum or not? I don't want to buy the third wrong flexplate :)

Is there a way to identify if it's Magnum or LA visually? I have doubts now