Yes it will as long as it's a FE C6. Also, if you do install it make sure of the starter you have. If you have the long neck style starter you will need to replace the flywheel and starter to have it fit. You can use the one from a 66 and up 390 motor.
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