If you have the bellows length and want to try it while you are here, I have a 600mm Fuji C. It is on a Sinar board but we can take it off for the occasion. The 450mm is close to 464mm normal for 7x17. Perhaps the 600mm is closer to normal for you. I believe you measure the diagonal of the film.
It has 24" of bellows, and it takes Sinar boards, so that would be perfect!