hi
the front lifting points in the pic above are perfect, anywhere on that chassis rail, this is solid no issues
the rear lifting point in the pic above you have to be cautious, if the sills have bad rust or rot, that area is also prone to rusting, its quite thick if its ok, but I've seen some S-type completely rot away there, just a bit further in, you have the rear sub frame mounting bolts, this is solid and the area it bolts to does not rust either, I've marked the area on the pic below
yellow dot on pic below is subframe mounting bolts, this is a solid lifting area suitable for a trolley jack
cheers
Joe