Big Block flex plate

I want to replace the flex plate on my '76 440. This is an externally balanced engine, and has a weight on the converter. Looking at B&M's website, they show one for an externally balanced big block, PN 10237. It has a scallop on one side. When using this flex plate, do I need the weight on the converter as well, or can any converter without the weight be used? Thanks in advance, Bob

The scallop is there to compensate for the engine balance factor. In other words, the B&M flexplate allows you to use any neutral balance converter. Grind the welds to remove the weights from the converter.

I'm using one on a 400 with a mech. roller cam. I've seen 7,000 rpm and it is smoother than baby shyt. Changed trans. and to neutral balance converter in mine as well. You no longer need the weights on the converter.

I used the scalloped B&M on my last cast crank 440 with a neutral balance converter. Worked perfectly.

Thanks for the info!