I know it was offered in some 1996 f250's with the 7.5L (460) v8.
2004 was last C5 ,2005 was 1st C6
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.
Transmission fluid
Type F for a 1971 C6
C6
3 gears
depends on the year of the transmission. early models use type F later models use dextron 3
E4OD(transmission) with C6 in overdrive
Type F
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.