Got it all together and started the tuning. Due to my stupid idea of running the counterflow head, I've had to delete the ISV due to it allowing too much air in at idle. It would need HUGE fuel map changes to compensate, but when revved, it would be too rich and stall out. Until I figure out the ISV mapping, I've cracked the TB open a bit more and plugged the ISV port. I'm half tempted to swap back to the crossflow head, but that would mean a few more weeks of work (car time is not really available much ).