The QD lineup eventually got needles on the small end of the rod. Yours does not. The center main also does not have needles bearings. That is why you run these on 24:1, never 50:1 as sometimes suggested on here.
You can upgrade to needles on the earlier pre 1961 QDS though, I do it all the time when I rebuild a powerhead. The 1963 set is the best set to use as the rod was beefed up through the years as well. You have to pretty much swap everything though.