I and several friends have had no problem hooking and holding chinook on #4,6,and 8 hooks. In fact, I never use anything larger than an Alec Jackson #3 Fushica Bunny Leech for chinook or chum.
You description of the way you swing you flies for chinook is exactly what I meant when I said that I fish the unweighted flies on a sinktip with a slow swing. That is how I get the slow swing.
Now, go out and hook some of those fish with your big Daiwa!