Measurements are in 'mm'. I'm Australian and thus have had limited exposure to imperial sizes. It's metric all the way for me! Also, all measurements are +/- 3mm as it'sdifficult to get really precise in-situ.
From floor to bottom of shifter: 50mm.
The floor has a slight recess giving the shifter and cable slightly more room than the surrounding structure.
Neutral to dash: 207mm
3rd to dash: 155mm
4th to dash: 260mm
The shifter I've ordered should be here in a week. If it doesn't fit, I'm going to cut and shut it.
I figure 20mm on the bottom will shorten the throw significantly. From the fulcrum ball to the lower ball is about 75mm centre to centre. 95mm is ample for throw shortening while still providing clearance.
I'm not going to cut anything off the top; I plan on using it for hill climbs and want the shift lever as close as possible to the wheel.
Winning at Mirage!