question: Your tapping vacuum off the choke pull off, you stated the vacuum reading is the same at any rpm? (I found it is manifold vacuum *)
2. Your idle AFR is too rich. it should be on the leaner side and your part throttle should be closer to stoich but that may be because if your vacuum 'leak' (your AFB was getting better idle numbers)
EDIT>> choke pull off vacuum is manifold vacuum, straight shot to plenum but though a restriction!<<<
* Lots of info about this port and its restrictions and its sources at 4:30
