And while we're on the topic of remote shifters, my magic wand shifter buzzes really bad at certain RPM and I've tried a few fixes. Looking at the prior posts in this thread got me to dig out some of my remote shifters and see if the later style top can be adapted to the 850 diff cover...
Remote gear lever at the top, 850 gear lever at the bottom & an 850 diff cover

Success! The remote retaining plate, spring and nylon split flange washer are a direct swap. I just need to find some correct length bolts and see how it is in the car

Unfortunately the nylon split bush at the bottom doesn't fit the magic wand setup as the ball on the bottom of the shifter is bigger, and the cup on the shift rod is smaller.
Attachment:
gearsticks.jpg