Hanging rear quarter panel to roof belt trim moulding! 1965 Valiant

Thanks, Yes I pulled back the headliner and see no evidence of filler, perhaps it never had the trim or did they all come with?
They all came with trim, as that is how they covered the seam between sail panel and 1/4 panel. Like I said that molding appears to be 66
and may not fit your 65 contours. 66 roof is one year only and who ever did the body work on that car buried that seam. You might want to leave
it as it is, because you will probably open a can of worms by trying to put a molding there.