With a large shutter (e.g. Ilex #5), depending upon the size of the lens, you can mount the shutter in front of the lens (as mentioned by John), or the lens in front of the shutter with (typical packard mounting, except using a lensboard). Either mounting may vignet depending upon angle of view and format.

The advantage of front mounting the shutter is that if the filter threads are standard, you might be able to purchase filter thread adapters to mount the shutter onto multiple lenses. For mounting the lens in front of the shutter you will need to machine adapters for the different lenses to fit into the shutter.

I have a trio of barrel mounted process lenses for my 8x10 that I am looking at that issue as well. I do not however, share your need for speed.

Good luck and let us know how you make out,

Len