Depends on the C6 transmission you have. They made several variants for different Ford Engine types for the FE and 385 Big Blocks. So For a 390 you will need a C6 that mates to an FE engine.
a c6 transmission is the best match
C6 or an aod
No the c6 is a 3speed automatic transmission that was used on earlier fords.
Usually a C6 transmission.
A C6 transmission including the torque converter will take 12.5 quarts.
There are adapters for everything.
Transmission fluid
Type F for a 1971 C6
No, the 390 uses a C6 transmission and the 289 uses a smaller C4.
C6
3 gears