All full sized Ford cars, from 1957, thru the mid 60s, had 9@ rear ends, regardless of what engine it came with. I believe the 9 3/8" rear end came out in some vehicles in 1966, and the 8 1/2" integral shortly afterwards, but even still most had a 9". The intermediate unibody Fairlanes came out in 1962, but prior to that, all Fairlanes were full sized, full frame cars. My 59 parts car was a 6 cylinder, 3 speed manual, and it came with a 9" with 3.70 gears.
