Transmission Oil Change confusion

So I have a deep transmission pan on my 727. It's a MOROSO aluminum
DEEP sump pan.

2.33" deep.





I have a leak around the front of it between the pan lip and the transmission so I am changing the gasket.

It has leaked for a while drip drip drip and I just kept the fluid level up when it did leak.

Now I want to change the gasket again but I am not sure how much oil to put back in. I did not drain the cooler lines nor the torque converter.

I was told that 4qts is typical for this type of change...does that sound right?

I know your supposed to check in N when running to determine the level. Unfortunately I am using an aftermarket Lokar dip stick and it is impossible to get an accurate reading...it always looks like its over filled on the stick.
I am hoping that I can get close to normal with this change.

So anyone out there wanna set me straight on how much oil to put back in.

Yes I am measuring what comes out as well but not sure if I overfilled before due to adding oil frequently.....just looking for a base point.

Thanks,

Mop