It looks to me that the only issue with leaving the assembly bolted to the bellhousing is if there's enough room to get the pedal shaft out far enough to release the pedal. And then maybe to push it back in place. I don't know how tight the shaft would be in the mount.
Can you see if the pin goes all the way through? If it does, it's probably a cylindrical pin, not tapered.

I'm just spitballing from looking at your picture. You'll have to confirm it'll work, being hands-on.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.