I wasn't aware that the cast crank 440s had weights on the converter or flexplate. My cast crank 440 has a balancer that says "used on cast cranks only". Am I still going to need a weighted converter to put my 727 behind it in my truck? I don't have the original converter anymore so I can't verify if it had any weights on it. 
Yes you will need a torque converter with a weight or an aftermarket flexplate that is weighted.
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