Anyone DIY an LS (LH6) e38 ecm standalone harness?

So has anyone done their own harness with a gen IV e38 ecu? The information on lt1swap.com is a good start, but it has left me with a few questions.

Not done a gen iv yet but what are the questions? I've done several gen3 harnesses. The new computers are tiny, so I probably will be trying to get my hands on one sooner rather than later.

I plan on bolting it to my th350 for now, so I'd like to remove the trans wiring and I am curious if anything might have a shared function and need to stay.

Also there aren't many specifics on the CAN wires to the DLC and if there are any tricks needed to retain functionality.

Got a trustworthy source to have my vats disabled and the rest of the nonsense I wont be needing?

More to come for sure.

I don't have any tuning software yet. How much adjustment is available to the VSS inputs? Will I be able to make a 4 pulses per rev speedo drive adapter work? I stumbled across one in the garage today.

If i get a chance tomorrow i'll open up hptuners and see if i cam get your speedo answer. It turns off vats just fine.

Thanks I appreciate it.