Here is my procedure, which works good.
The key issue is alignment of the throttle pushrod.
So install the engine and hook up the throttle pushrod.
Then install the leadouts.
Jockey the position of the bellcrank to get the throttle to work properly.
Once the throttle is working OK, then get the up/down system working right.
When the throttle, updown and leadouts all work right, you have established the proper position.
Your question could not be answered without some hands-on trial and error. This stuff isn't so easy.