Torque converter clearance

Well since the slots in the hub are about what, 5/8?. And the pump drive lugs are about, what 5/16 to 3/8? That would indicate 1/4 inch to be about optimum. And thats about what Ive experienced.The hub has a bit of lead-in chamfer, soif it comes out less than the 1/4, that would be a good thing.
The stator support has plenty of engagement. And the input shaft as well.
Now the pilot, on the front needs to come ahead for support, so easy on the spacers.In practice,it all fits pretty good. At least with factory parts.