Randy, agreed that the casting numbers do not indicate anything about what performance level the transmission is from, K code, a code, c code etc, no difference in the cases. It would interesting to know for reasons of correctness which casting numbers in terms of C5DP, C6DP etc changed in different build dates from San Jose. I for one would be very interested in knowing exactly when Ford changed from the C5DP to the C6DP cast cases on the early K code 66 cars.
Karl