Pretty sure the GM manual says 43.5?

With it running good when warm it's probably a tune issue and not mechanical. There doesn't seem to be anything stock about the engine, lots of work to get a good tune. Then if all the data looks good you work on the issues like cold start and warm start, these are common.

The AFI bin number won't help as we don't have the bin file. The only way we could look at it is for you to read it.

Have you tried calling them to see if they will update the chip? Long ago they used to be very helpful... not sure about today?