So I am little confused by where you want me to take measurements.
Here is what I think I have.
But taking some on the Stant, 45359 by the way, I think you are talking about the depth.
From the inside of the circular disc to the farthest point where it goes in the head.
Looks like 55/64".
From the outside of the disc to the farthest point it goes into thermostat housing.
Looks like 52/64".
So that appears to be the same.
So it just so happens I have the thermostat that I took out of the Jeep.
Has a Mopar logo on it. Part number looks like 52028186.
The part that goes into the head is longer.
Looks like 60/64".
The part that goes into the thermostat housing is much shorter.
Looks like 44/64"
So the original Mopar thermostat has that hole and if I am not mistaken it goes at 12 o'clock in the head.
The size of the disc appears to be the same. Used my HF Caliper for that.
2 things.
First it is an HF Caliper. Second I am not the best at using it so..... LOL.
Also even though I can't find a Mopar symbol on it I did find the part number, 53006192, on the housing.
So I am going with original.
So you mentioned that it fit when clocked a certain way.
I approximated how the housing would be on the Jeep.
When I have the Stant in housing, guessing where it would sit when in the channel on the head,
when that "U" piece that runs over the top in the thermostat housing is at 2 and 8 o'clock it appears to not sit flush in the housing.
When the "U" is at 12 and 6 o'clock it does.
And appears to sit flush at most clock settings except the 2 and 8.
And since this does not have that hole I am guessing it really doesn't matter how it is clocked.
Of course when it the channel on the head, cause I am just guessing where it would fall in the housing, it could be totally different.
I hope this helps.
I am going to leave everything out in case you have more questions.
I would post pictures but refuse to get one of those 3rd party image things.