Russell, See how high up above the trans those factory shifters are? I really didn't want that so when I made my mounting plate I located the shifter pivot pin (where the OEM one has a grease fitting) just about where the speedo drive is. I run a tach in my car & don't use a speedo. This puts the whole affair including where the shift lever bolts on below my natural floorline and the shift rods run about level to the ground. I used a 1/2" plate scrap & used countersunk allens to attach it to the trans. Then I just flat mounted the shifter into tapped holes in the plate. AND, grind a slot for the reverse pin clearance. Just my way, but when you're making the plate you can position it where you want it.
Doug