HELP...Will not idle in gear

First off... thanks for all the advise.
I checked the carb and its a carter 2681, looks like only one mixing screw on the bottom at the front. I replaced the vacuum line because I had some. Then pulled the dizzy and set the bottom plate so I could set the timing to "0". Car would start with ignition knock but would not idle. sooo I went the other way, pulled the dizzy, set the plate for advance. Started and ran but would not idle in gear. Bought a vacuum gauge and read 17 " mercury, not enough. Made a richer adjust on the carb but still 17". I remembered comment about the timing soooo pulled the dizzy again and set the the assy forward to where I thought the vacuum line off the distributor was close to the frame rail. I adjusted the back plate to the middle and reinstalled the dizzy. Made sure the rotor was pointing to #1 spark plug. In the process I saw the #3 spark plug wire had a broken end so I replaced it with a spare. Got engine running and set mixing screw with the vac gauge to 20". Advance the timing by ear and tightened down the bolt. I went for a drive and as close as damn is to swearing.
I arrived home from the drive and went to put the timing light on her. Then saw another groove on the front pulley.. wth. My brother in law may have made the paint mark on the wrong groove ( damn Chevy guy)

Oh well looks like a bunch off errors. #1- I may have put the dizzy back in the wrong position with the rotor still pointing to #1 spark plug.
#2My brother in law made a paint mark on the wrong groove on the front pulley
#3 the #3 spark plug wire end was broken, poor contact
and #4 carb was set too lean.
Back running again until the next adventure

thanks again Derrick.