I made a tripod block and have it mounted more or less permanently to a Majestic head to support my 11x14 B&J view camera. It was well worth the effort as now mounting/unmounting/balancing the camera is so much simpler.
Did you strip off all that "lovely" gray paint these normally come attired in?
For my 8x20 camera, and also for 8x10, I use a large quick release Manfrotto it's a 100mmx100mm, and a very good manfrotto head and a stable tripod(I don't remember the brand)
It's very useful and perfect for my 8x20.
I put here the image of this quick release: