To answer your question;
I have done many a sidecover removal and re-install with a ST10 installed in a vehicle. Install the forks into the sliders, then secure the sidecover on reassembly.
This job is not as easy with a Muncie, you need to remove the 4 mounting bolts, rotate the transmission to install the forks and sidecover as one assembly.
Andy has a good point, removing the trans would allow you to replace the front seal in the front bearing retainer.