I've not measured it as yet but the Flange on the TC where the drive plate bolts onto looks more than 25mm from the bell housing face of the gearbox. It almost looks like the bolts used to bolt it together may be too short. I am right thinking that TC can't push into the gearbox too far?
not by fitting into box by hand ,it could if drive plate was shimmed too far from rear of engine and you pulled the box onto engine with the bolts, it helps to screw some long bolts in tc to use as handles so you can feel it locating on the 2 x splines and pump drive
I found the pics I sent Bemble with a before and after I seated the TC correctly with the red arrow showing the difference in the distance from the front face.