We have learned that the FRDM-K64 boards no longer ship with socket headers. This was not expected.
To attach the FRDM board to the trapezoidal System Board Dual row pin socket headers are needed. It is not recommended that you solder the FRDM directly to the System board pins as that would make it very difficult to service or access the System board.
Connectors needed are:
1x 12 Pin - 2 Row x 6 pin 0.100" Socket header
2x 16 Pin - 2 Row x 6 pin 0.100" Socket header
1x 20 Pin - 2 Row x 10 pin 0.100" Socket header
These socket headers follow the conventional 0.100"x 0.100" (2.54mmx2.54mm) pin spacing shown below