Water Pipe Connections to Radiator

if you don't mind I copied the illustration from a Katolog I found so I can visulize your discription
"...upper rad outlet..water pipe w/bleed..left under body pipe...water pump

..lower rad inlet...right under body water pipe..(swirl)"

from this illustration it looks like
Upper w/bleed to right to pump
Lower to left to swril

I can only speak for myself. Mine are all 4". I did have them apart and there was no issue with reassembling them.

Logic would seem there is something you changed from the original.

JFB#05177;
What your illustration depicts is exactly where I am working. The #18&19 pipes joining the underbody pipes to the radiator indicates #13 hoses which are all 4" hoses. When I attempt to connect the left side pipe to the radiator, the alignment is off considerably and the distance of the pipe to the radiator is approx 6-7 inches away.
Now to add more confusion. I have an illustration which essentially shows the same information as yours; the upper radiator outlet connects to the "air bleed" tube, to the right underbody tube, then to the water pump. The problem I see in doing it this way is when you get to the bulkhead and connect pipe #11 and hose #15 to the underbody pipe, you are crossing over pipe #12A.
There are a number of posts whereas left side is the upper radiator to water pump. Since I am in early stages of 3639, just want to do it right so I don't have to do it over.
Thanks again for the info.

PanteraDoug;
I happened to be responding to JFB#05177, then saw your post.
Which way are your pipes connected?
1.)Upper radiator, to left side underbody pipe to water pump or
2.)Upper radiator to right side underbody pipe to water pump.
Thanks