For tall/long torso types who autocross or track and are thinking about the Toyobaru:
That's a finger's breadth of clearance atop my XL Shoei with the seat in acceptable position relative to the controls (shoulders against seatback with wheel at crease of wrists with arms straight), telescoping wheel all the way down and towards me, seat lowered as much as it can be.
Slim clearance, but it'll work.
For comparison purposes since height doesn't always correlate with torso length (as exemplified by me!), I can brush the soft top with my head on an MX-5 if I don't slouch.