Many thanks to those who have responded so far.
SBF, I don't think that that's the ref because I remember FF went on at some length with that Romans passage, tying together the various notions there, in the vein "Who can find fault with the anointed because it's God who has declared them righteous?" I'll look over that 71 WT later. Nice to see you responding...
the fall guy, that ref to "Jehovah God ... views them as being perfect, without sin" is in tune with what I remember, but the art. (or book?) I'm thinking of went on at some length expounding the Romans passage and stating the same perfection thing in more detail, so your ref is not the main one. However, that such a statement could be said in 1974, probably indicates that the art./book I'm looking for predates 1974, so a special thanks for that.
blondie, yes, recently GB II has sort of changed their tune a bit, indirectly inferring that they could be wrong perhaps, but they have not really come out and said that. Instead they use that strange language about "whether these appear sound ... or not." And yes, FF's old view that I'm looking for is certainly shown to be false by Peter's sins. The validity of the org's thinking is not the issue on which I am focusing. We know that often has been shown to be wrong. I'm simply trying to reconstruct some dominant but—on the surface anyway—under-emphasized thinking that influenced decisions in WTS history, and I strongly suspect that one was this notion FF had about the anointed being "perfect, without sin" (according to the ref. that the fall guy has provided) due to Jehovah's having "declared them righteous." That Isaiah passage is the one that says "No weapon formed against you will succeed" etc., so it would tie in to the notion of them being "perfect" and unassailable, and again, it has a ref at its end to Jehovah declaring them righteous.
As for the Matt 18 passage, the Greek is a bit odd. It uses the rare future perfect tense and very few translators render it literally. I'll have to check, but FF may have played with his translations somewhat from earlier NWT renderings to later ones. If I recall correctly, and I can't check this right now, but Chas. B. Williams' NT translation is one of the few that renders the Greek literally there. It's significant as to the meaning. Anyway, FF may have used this passage too in that article or book ref that I can't remember.
btlc, thanks for the ref. I looked it over, but it does not expound Rom 8:31-34 like I remember, nor are any claims made about the anointed being perfect and sinless.
Does anyone know how to DL material from the official JW webpage? It's not in the sort of format that others use where you can simply DL what is put up as a pdf.
Looking forward to the further input of those who have already responded, as well as others, until the mystery is solved.