Thank you for looking that detail up and advising; I’d not wanted to get this wrong as it’s so well “buried” in the manifold that to adjust later could be a pain, but was aware from burring to the throttle spindle screw heads (and that backed-out stop),
somebody’s been here before.
I’ll leave it at the current stopped position, which is probably <2 thou clear at the widest. It’s so far been “soggy” IMO on the pedal and I’m hoping the vacuum leaks have been a part of this, plus the misaligned kickdown.
With respect to the throttle switch, can’t find a lambda sensor- I have attached pictures of the exhaust manifolds - I also felt underneath in case a port had been plugged. There’s no cat, Australia began transitioning to unleaded in 1985 or so and it took until the late nineties for all forms of leaded fuel to be phased out for road vehicles. Is it possible the microswitch just informs the ignition driver?
Besides the site which referenced a small clearance (https://bigcoupe.com/phpBB3/viewtopic.php?t=15721 - first few posts) the other reference found to setting the butterfly was on Ferrari Chat, which has generally seemed a well-filtered (informed) site with tech details: https://www.ferrarichat.com/forum/threads/adjustment-of-k-jetronic-on-f328.343572/ (Post 5 posits, and is affirmed by others, that their engines will just, barely idle with the idle air screw wound right in.) This was why I’d been so determined to mine for accurate data.