Welcome to APUG. If you search Google (maybe images) there's someone who built a fixed 6x17 camera and an insert it shows up quite easily, I have it saved somewhere but not immediately to hand. It look well made and could easily be modified/adapted for a different camera.
I'm planning to use some Graflex track-bed and guides (from 3x4 Graphic) that I bought 2 years ago along with a Super Graphic front standard that I modified to fit to build a 6x17/5x4 camera. The idea is it'll essentially be a wide angle camera and use Linhof/Wista lens boards, I currently use a 75mm SA on a fGaoersi 6x17 which I prefer to the 90mm.
My problem is often carrying a 5x4 and a heavy 617 camera (no movements) so a body slightly wider than a Crown Graphic cut away at the top for rise with a 75mm and a fixed bed (non folding) would be ideal, the Super Graphic standard has good rise, fall, shift and tilt forwards as well as back. I'm lucky because I have a lot of existing spare parts to work with no use for anything else (to me).
Ian