Are all 5.9 Magnum flex plates the same? 904 install issues.

So how do I go about getting this thing in balance assuming magnum weighted balancer, magnum weighted flex p!ate and LA weighted converter?

Provided this is a stock bottom end 5.9, if you have the 5.9 weights on the flexplate (you need to verify as not all of them had them), then you don't need any balance weights on the converter. Cut them off. Otherwise you will have a hell of a vibration and get to take it back apart.

If you want to post some pictures of the torque converter side of your flexplate we can help you figure out your combo.