1971 GE Portacolor H3 chassis color help

[Electronic M]

I think you two may be speaking different languages. Your interpreting wormy as Barber poling (chroma Osc out of sync), and I think Zeno means the monochrome portion of the picture is wormy and color doesn't Barber Pole.

It's not uncommon for a slightly misadjusted chroma Osc to loose sync when color signal isn't at it's peak on the fine tuning.... What I typically do when that happens is locate the chroma Osc slug on the schematic/in the set, get a full screen color bars test pattern on screen, turn color to max and detune the fine tuning till the barber poling is barely visible enough to make an adjustment then get it adjusted to sync like that.
EDIT: I just remembered this is a GE...They don't use a color osc and instead they amplify the burst and feed it into a coil that rings (resonates) at chroma osc frequency for longer than 1 horizontal line....Not sure how those get out of sync... Maybe the resonant coil is adjustable and needs tuning or the burst gate isn't working properly.