use of mamiya 645

I've a Burgess 1278 and would like to start using my Mamiya 645 on it. Anyone have any experience with this? I can't seem to locate any of the gear I'd need to attach the camera to scope. Anacortes has some adapters, but the price is as limiting as the detail on them.

I have a feeling I might need a field-flattener, along with the mounting gear. How's the film-plane fov?

Thanks,
Paul