Stalls on idle in gear

Set the idle mix screws with it in gear at the idle speed you want. What is fine in park is lean in gear. In gear is what really counts here, IMO. If the rpm drop from park to in gear is big, more than about 100rpm, ideally less than 75, something isn't right.

You might also disconnect everything that is vacuum related from the, plug that stuff and set it up. Then hook one thing at a time back up and note any change. Sometimes the PCV or power brakes are a vacuum leak.