Water pump to radiator space?

NO!
I am not asking all members, only those that are willing. You sir are obviously not, you are only willing to be abrasive, please feel free to keep doing nothing.
I also never said “Do it now”, if your in your garage take a look and report at your leisure.
This forum is for a-body info so why not have that info specifically focused on one thing. There are tons of post about fan options but none on this single dimension. So why no know what to expect when doing an radiator upgrade.
I don’t want to be overly specific, I would like to have data spanning different a-body cars. This will help me and Cold-Case radiator with some variables. They are claiming I should have more then 3”. So there for if I am able to build a spreadsheet showing a trend this may help understand different applications.
I have a 66 Barracuda
Thank you 69FBCuda for facilitating me to clarify. I will be sure to be overly wordy, PC, and explain to a “T” my intentions next post I make.
Now that’s settled, back to the question and data.