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455 engine sold as a core. It is the F block, J heads, date code 4. the motor turns back and forth but Im sure has rust in cylinders from sitting. Located in Jesup Iowa. $200.00
I have a 1974 "F" block with "J" heads, and a 1975 "FA" block with "J" heads, looks like the switch came late 1974?
FA blocks were used as early as the 1973 model year. There was overlap between F and FA use, primarily on MT cars where the hole for the ball stud on the F block was required. Again, the surprise isn't that it's an F block, it's that it is a sans-Serif F that was used on the 68-69 motors.