B&M Flexplate Install. Did I do it right?

News Flash! I drove over to http://www.mopacautosupply.com/index.html yesterday and talked with Chris Lunn, resedent Mopar expert that has a 69 Dart, LA 360, 727. Turns out my flexplate is on correct but, it is the wrong P/N flexplate. The one in my picture is for a externaly balanced engine. See the cut out. My engine is internal balanced and the flexplate has no cut out. The correct flexplate is stamped "Engine Side" as well. Looks like I have to change it out any way. FYI