5.9 Magnum engine timing cover swap

I am putting together a Magnum 5.9 engine with a V-belt system for my 65 Dart.
I put a small block timing cover off a 73 charger on it, however, the Harmonic balancer
will rub the timing tab. Do I need to get the older 273 timing cover without the tab to make this work? any suggestions?

Thank you in advance