Beseler 67S Dichro 35mm to 6x6

I just got a 67S off craigslist, I want to use it with my 6x6 prints. I'm not sure what pieces I need to change to be able to do this. I know I need to replace the lens (it's a 50mm, I think I need >75mm?) and negative carrier (currently a 35mm), is that it or do I have to switch out the mixing box too?

thanks

If your dichroic head has the 35mm mixing box installed, you will need to install the 6x7 mixing box instead.

You may find that there is a 6x7 mixing box already there - it works fine for all sizes. The only reason to use the 35mm mixing box is that it shortens exposure.

Otherwise you've got it covered - change the lens and the carrier and you are good to go.

Matt