Bear with me here...

Steerer OD = 25.4mm
Crown Race Seat = 27.0mm
Crown Race Seat Height = 5.0mm
Head Tube ID = 29.5mm
Steerer Length = 182.0mm from top of crown race seat/187.0mm from bottom
Head Tube Length = 145.5mm
Difference Steerer - Head Tube = 36.5mm

So, it sounds like I have a 1" JIS setup, right?

What is an acceptable stack height range for headsets for this frame? Thanks.