Food for thought:

I had an opportunity to look at a 1970 ONLY parts catalog today (9/69 Edition!) and the upper hose data pertaining to 440 engines is as follows:

W/ 383/440 W/O AC 1881804
(It is baffling that they list a straight, flex hose for this application, which is what this hose is.)

W/ 383/440 W/AC W/Max Cooling 2863257

W/ 426/440 W/Manual Trans 3462113

W/ 440 W/O AC W/O Max Cooling 3462116

All engineering drawings I have indicate 2863257 as being the correct hose for both A/C and non-A/C applications.

Bill Rolik