I finished with the alignment. Here's the video IF response before and after.
It really wasn't that bad to begin width. The service info calls for the peaks to be within 30% of each other. I tweaked the coils to equalize the height, but the only way to get a flattop is to kill the bandwidth.
My scope is set for 1 MHz / div so the bandwidth at 50% is about 3.2 MHz just as the service info calls for.
I suspect the IS was a design compromise to fit the chassis into a relatively small cabinet. The Admiral 20A1/20B1 stagger tuned chassis I've restored previously perform better. Then again those sets use a split chassis with plenty of room for more complex circuits.
The picture is prrety good except for some faint diagonal interference lines.
