Rav Moshe Feinstein's view of Daas Torah

I would appreciate information as to the source of the following quote from the Artscroll biography (revised edition) that was recently published.  I have found nothing comparable to it in his published writings. I cite below a discussion I had with Rav Dovid Feinstein as well as the Introduction to the Igros Moshe and a teshuva which says there is no such thing as a gadol today that one can not disagree with. I added  a comment from the introductory essay from the 8th volume of the Igros which seems to directly contradict the Artscroll statement

 Igros Moshe (Reb Moshe - Artscroll biography 2^nd edition 2011): There are people who maintain that talmidei chachom are not qualified to decide political matters that gedolei Yisroel should limit themselves to Torah and Halacha. Such people cannot be considered within the Torah camp. One might well say disregarding the advice of a talmid chachom is far worse than violating a commandment. One who violates a commandment because he is too weak to resist temptation at least knows that his action is wrong. By contrast, one who ignores the advice of a talmid chachom denies that a Torah scholar’s wisdom is superior. This is a far more serious breach (page 224).

===================

Rav Dovid Feinstein (personal communication): In response to the question of whether his father ever justified his halachic decisions Rav Feinstein told me the following, “I never heard my father claim that his authority was from Daas Torah. He always insisted that the authority of his rulings was because they involved correct reasoning.”

Igros Moshe(Introduction): And therefore I also found it appropriate to publish my teshuvos,  since I am merely clarifying the halacha and every talmid chachom and posek is able to examine my words and decide for himself whether to make halachic rulings in accord with my views. They can see that I did not blindly rely even on the writings of our great rabbis. I analyzed them with all my strength to understand their correctness - as we find stated by Rabbi Akiva Eiger. Similarly I request that all those who read my writings that they should carefully examine my words and only then [if they are acceptable] to make practical rulings in accord with them

Igros Moshe(O.C. 1:109): This that you apologize for disagreeing with me in a halachic issue – this is totally unnecessary. That is because this is the way of Torah that it is necessary to establish the truth. Chas v’shalom to silence one who disagrees with you – whether he is being more lenient or more strict. [While there is a discussion about disagreeing in a formal court session Sanhedrin 36 where the court is deciding on the guilt or innocence…] it is not a problem to disagree with the gadol (greatest scholar) when he is saying something in the course of teaching the material or even if he is making a practical halachic ruling but he is not part of a formal court. We see this in many places in the gemora where students question their teacher’s view. … It is obvious in these cases the rulings were not part of a formal court session. Furthermore it is apparent that there is no one today who has the status of gadol for this law that no one can disagree with him… Therefore even if you consider me to be a gadol – it is permitted to disagree with me and consequently it is required that you express your opinion and there is no need to apologize. Nevertheless regarding the halachic question that was raised, my view -that I wrote that it is prohibited - is the correct one.

Igros Moshe (Y.D.3:88): Is it permitted to argue with the words of our Sages in public – even in their communities? You are concerned about the permissibility of moving to Bnei Brak because there are times when you will be disagreeing with the Chazon Ish zt”l. I really don’t understand why you are concerned. In fact the opposite is true. [click link for rest of teshuva]

From 8th volume of Igros Moshe (hat tip to Yoni), "Active involvement of gedolei Torah in politics also in Israel aroused his opposition. He used to say that greatness in Torah is not combined with expertise in politics"