638 santego crank shaft clearance

[Kruggy88]

I was hoping someone with a 638 or one of the other model numbers it was called (I think 3467 and 380) be able to measure the clearance they have from the prop shaft pulley to the stringer.
I currently have both engines out of my boat right now and I am kicking myself for not measuring this when they were still in but I am thinking about installing crank mounted water pump and getting rid of the belt driven ones. I would love to do this while the engines are still out. I know it will be tight with the clearance but just seeing if someone could measure for me to see if it is an option.