What's up with the LA Dart engine?

cudamark said
The '64-7 273 crank has a smaller pilot hole for the torque convertor than the other LA engines so you'd need a custom one built Thanks, Mark

yeah but they still have the same large outter flywheel pilot ring, so just grind out the inner diameter convertor register of the early 273 crank for the later convertor snout.
fwiw