Thanks to everyone for the information + help.

I will soon have all the resources I need to do the testing. Fun part will be testing out this idea of Brick Free Technology using the EEPROM. Two loaders to be written. First (TSide) loads from the DLC using standard J1850ish commands. Second (ESide) needs to load from the SPI. Second is a bit tricky unless I can avoid working with the standard TSide support for comms with ESide.

Again, I appreciate the depth of knowledge here.

Thanks -Tom