360 small block info

The out going 727 had the flex plate for a neutral convertor, so I am assuming the set up was proper, but that is my concern.

All Mopar factory flex plates are the same design and have no weights welded on them. The weights for an externally balanced Mopar are welded onto the converter itself. Look on the front side of the converter and you should see a balance weight welded there. A neutral balance converter has no weight welded to the front of the converter. Please note all converters have balance weights welded to the outer rim of the converter to balance them neutrally. Don't confuse them with the weights to balance an external engine.