Ok spent a while going through what I've got easy access to unfortunately at this point can't provide what the original radiator marking was
Did check the later MPC but its worthless since it only lists the service replacement - one size fits all application
Checked the buildsheets I have and unfortunately don't have a 69 390 4 speed with AC. Sure you understand how rare your car is - just makes this more difficult
The 69 S code 4 speed buildsheets I have show two different radiators so its likely that some have the standard radiator listed while others had the extra cooling ordered. Just no way of telling - without running a Marti report for both, to see which one is which. My guess would be the C8ZE-L based on your car's build date and all the rest of the details
For the moment it appears (based on what I've found so far) that for a fan the C8OE-B marked fan is possibly the correct fan while the fan clutch of C8OE-A is likely the right one for the application
Hope this helps and that someone will come up with a matching buildsheet to confirm