Aussie L67 pcm's are different to American ones i think, we were still Delco memcal pcm's. The algo is after X amount of time above X Speed then enable the lean cruise table which is an AFR Target Modifier.

This all sounds to complicated id just slap a 4L60e in and call it done

you'd have to look at the wiring and solenoid operation, but id doubt you could operate the 6 speed with 4 speed delco.

sounds like it's making the ecu unhappy with it's pulses or width. So probably easier to stick it between cluster and ecu just to get your speedo correct.

im not sure what brands are out there nowdays, but anything that can feed the relevant fuel reading range as a 0-5volt output and wire that into pin B10 will be fine. You can adjust the ADX calculation to suit what the range is.

Found something, not much but might help.

i have some but once stock goes i wasn't going to order more, ive sold 2 in the last year so it's not worth my while order more.

i can't remember it maybe required to test without the sensor plugged in im not sure. Does test pass without sensor plugged in?

You can already wire one in if you want to use it for monitoring. Currently no working code that can run via MAP instead of MAF. I do have a beta S/C map bin I will post in beta section if someone wants to test at own risk.

Bin looks weird like its corrupt, ive taken stock Enhanced bin and copied your tables over, reflash this whole bin to your nvram and try again.

Make sure your using the enhanced xdf and adx.