Fan shroud

I playing with the old space issue. Seems like I read somewhere that the '69 cast pump is 1" shorter? The radiator inlet/outlets are different. Wanted to go with viscous drive fan, shroud combo. Don't know if this slant six shroud would work with a '69 Radiator. I would have to change my water pump pulley.
Yup, this thing is going to get sticky. I can start with the way it was before my engine work. If it cools, I will start again from there.
Thank you all for answering!