I am looking for a longer lens for 8x10. The Fujinon 600mm c is expensive and hard to find. I've found several 24in artars in barrel for a good price. But I want/need a shutter. Do these fit directly into an Ilex #5 shutter with no modification? Or would it be cheaper and better to get a copal #3 shutter? I think a copal might be better since it has more speeds. But then it may need to be sent to S.K Grimes which probably isn't cheap.

Thanks for any help.