Do 12/22 cold: if it starts and runs, run it till warm and readjust to 10/20. Ditch all vacuum lines except the carb dash pot and distrubutor feed. I bet that PCV line is the culprit. If it runs better with the PCV plugged, you probably have a bad PCV valve (if you have one at all) As they are supposed to be 99% airtight at idle and WOT.
